* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (79 commits)
TTY: serial_core: Fix crash if DCD drop during suspend
tty/serial: atmel_serial: bootconsole removed from auto-enumerates
Revert "TTY: call tty_driver_lookup_tty unconditionally"
tty/serial: atmel_serial: add device tree support
tty/serial: atmel_serial: auto-enumerate ports
tty/serial: atmel_serial: whitespace and braces modifications
tty/serial: atmel_serial: change platform_data variable name
tty/serial: RS485 bindings for device tree
TTY: call tty_driver_lookup_tty unconditionally
TTY: pty, release tty in all ptmx_open fail paths
TTY: make tty_add_file non-failing
TTY: drop driver reference in tty_open fail path
8250_pci: Fix kernel panic when pch_uart is disabled
h8300: drivers/serial/Kconfig was moved
parport_pc: release IO region properly if unsupported ITE887x card is found
tty: Support compat_ioctl get/set termios_locked
hvc_console: display printk messages on console.
TTY: snyclinkmp: forever loop in tx_load_dma_buffer()
tty/n_gsm: avoid fifo overflow in gsm_dlci_data_output
tty/n_gsm: fix a bug in gsm_dlci_data_output (adaption = 2 case)
...
Fix up Conflicts in:
- drivers/tty/serial/8250_pci.c
Trivial conflict with removed duplicate device ID
- drivers/tty/serial/atmel_serial.c
Annoying silly conflict between "specify the port num via
platform_data" and other changes to atmel_console_init
default y
select HAVE_AOUT
select HAVE_DMA_API_DEBUG
- select HAVE_IDE
+ select HAVE_IDE if PCI || ISA || PCMCIA
select HAVE_MEMBLOCK
select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
The base address of exception vectors.
config ARM_PATCH_PHYS_VIRT
- bool "Patch physical to virtual translations at runtime"
+ bool "Patch physical to virtual translations at runtime" if EMBEDDED
+ default y
depends on !XIP_KERNEL && MMU
depends on !ARCH_REALVIEW || !SPARSEMEM
help
kernel in system memory.
This can only be used with non-XIP MMU kernels where the base
- of physical memory is at a 16MB boundary, or theoretically 64K
- for the MSM machine class.
+ of physical memory is at a 16MB boundary.
+
+ Only disable this option if you know that you do not require
+ this feature (eg, building a kernel for a single machine) and
+ you need to shrink the kernel to the minimal size.
-config ARM_PATCH_PHYS_VIRT_16BIT
+
+config GENERIC_BUG
def_bool y
- depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
- help
- This option extends the physical to virtual translation patching
- to allow physical memory down to a theoretical minimum of 64K
- boundaries.
+ depends on BUG
source "init/Kconfig"
select ARCH_REQUIRE_GPIOLIB
select HAVE_CLK
select CLKDEV_LOOKUP
- select ARM_PATCH_PHYS_VIRT if MMU
help
This enables support for systems based on the Atmel AT91RM9200,
AT91SAM9 and AT91CAP9 processors.
select CPU_SA110
select FOOTBRIDGE
select GENERIC_CLOCKEVENTS
+ select HAVE_IDE
help
Support for systems based on the DC21285 companion chip
("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
select SPARSE_IRQ
select AUTO_ZRELADDR
select MULTI_IRQ_HANDLER
+ select ARM_CPU_SUSPEND if PM
+ select HAVE_IDE
help
Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
select NO_IOPORT
select ARCH_SPARSEMEM_ENABLE
select ARCH_USES_GETTIMEOFFSET
+ select HAVE_IDE
help
On the Acorn Risc-PC, Linux can support the internal IDE disk and
CD-ROM interface, serial and parallel port, and the floppy drive.
select HAVE_SCHED_CLOCK
select TICK_ONESHOT
select ARCH_REQUIRE_GPIOLIB
+ select HAVE_IDE
help
Support for StrongARM 11x0 based boards.
select ARCH_REQUIRE_GPIOLIB
select SAMSUNG_CLKSRC
select SAMSUNG_IRQ_VIC_TIMER
- select SAMSUNG_IRQ_UART
select S3C_GPIO_TRACK
select S3C_GPIO_PULL_UPDOWN
select S3C_GPIO_CFG_S3C24XX
This workaround defines cpu_relax() as smp_mb(), preventing correctly
written polling loops from denying visibility of updates to memory.
+config ARM_ERRATA_364296
+ bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
+ depends on CPU_V6 && !SMP
+ help
+ This options enables the workaround for the 364296 ARM1136
+ r0p2 erratum (possible cache data corruption with
+ hit-under-miss enabled). It sets the undocumented bit 31 in
+ the auxiliary control register and the FI bit in the control
+ register, thus disabling hit-under-miss without putting the
+ processor into full low interrupt latency mode. ARM11MPCore
+ is not affected.
+
+config ARM_ERRATA_764369
+ bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
+ depends on CPU_V7 && SMP
+ help
+ This option enables the workaround for erratum 764369
+ affecting Cortex-A9 MPCore with two or more processors (all
+ current revisions). Under certain timing circumstances, a data
+ cache line maintenance operation by MVA targeting an Inner
+ Shareable memory region may fail to proceed up to either the
+ Point of Coherency or to the Point of Unification of the
+ system. This workaround adds a DSB instruction before the
+ relevant cache maintenance functions and sets a specific bit
+ in the diagnostic control register of the SCU.
+
endmenu
source "arch/arm/common/Kconfig"
MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
+ depends on MMU
select USE_GENERIC_SMP_HELPERS
select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
help
processor machines. On a single processor machine, the kernel will
run faster if you say N here.
- See also <file:Documentation/i386/IO-APIC.txt>,
+ See also <file:Documentation/x86/i386/IO-APIC.txt>,
<file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
<http://tldp.org/HOWTO/SMP-HOWTO.html>.
If you don't know what to do here, say Y.
+config ARM_CPU_TOPOLOGY
+ bool "Support cpu topology definition"
+ depends on SMP && CPU_V7
+ default y
+ help
+ Support ARM cpu topology definition. The MPIDR register defines
+ affinity between processors which is then used to describe the cpu
+ topology of an ARM System.
+
+config SCHED_MC
+ bool "Multi-core scheduler support"
+ depends on ARM_CPU_TOPOLOGY
+ help
+ Multi-core scheduler support improves the CPU scheduler's decision
+ making when dealing with multi-core CPU chips at a cost of slightly
+ increased overhead in some places. If unsure say N here.
+
+config SCHED_SMT
+ bool "SMT scheduler support"
+ depends on ARM_CPU_TOPOLOGY
+ help
+ Improves the CPU scheduler's decision making when dealing with
+ MultiThreading at a cost of slightly increased overhead in some
+ places. If unsure say N here.
+
config HAVE_ARM_SCU
bool
help
depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
select AEABI
select ARM_ASM_UNIFIED
+ select ARM_UNWIND
help
By enabling this option, the kernel will be compiled in
Thumb-2 mode. A compiler/assembler that understand the unified
CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
def_bool y
+config ARM_CPU_SUSPEND
+ def_bool PM_SLEEP
+
endmenu
source "net/Kconfig"
config HW_CONSOLE
bool
- depends on VT && !S390 && !UM
+ depends on VT
default y
comment "Unix98 PTY support"
source "drivers/char/pcmcia/Kconfig"
- source "drivers/serial/Kconfig"
+ source "drivers/tty/serial/Kconfig"
source "drivers/i2c/Kconfig"
#include <linux/init.h>
#include <linux/kernel.h>
+ #include <linux/interrupt.h>
+ #include <linux/scatterlist.h>
#include <linux/sfi.h>
#include <linux/intel_pmic_gpio.h>
#include <linux/spi/spi.h>
struct spi_board_info *spi_info = info;
int intr = get_gpio_by_name("max3111_int");
+ spi_info->mode = SPI_MODE_0;
if (intr == -1)
return NULL;
spi_info->irq = intr + MRST_IRQ_OFFSET;
pentry = (struct sfi_device_table_entry *)sb->pentry;
for (i = 0; i < num; i++, pentry++) {
- if (pentry->irq != (u8)0xff) { /* native RTE case */
+ int irq = pentry->irq;
+
+ if (irq != (u8)0xff) { /* native RTE case */
/* these SPI2 devices are not exposed to system as PCI
* devices, but they have separate RTE entry in IOAPIC
* so we have to enable them one by one here
*/
- ioapic = mp_find_ioapic(pentry->irq);
+ ioapic = mp_find_ioapic(irq);
irq_attr.ioapic = ioapic;
- irq_attr.ioapic_pin = pentry->irq;
+ irq_attr.ioapic_pin = irq;
irq_attr.trigger = 1;
irq_attr.polarity = 1;
- io_apic_set_pci_routing(NULL, pentry->irq, &irq_attr);
- }
+ io_apic_set_pci_routing(NULL, irq, &irq_attr);
+ } else
+ irq = 0; /* No irq */
+
switch (pentry->type) {
case SFI_DEV_TYPE_IPC:
/* ID as IRQ is a hack that will go away */
- pdev = platform_device_alloc(pentry->name, pentry->irq);
+ pdev = platform_device_alloc(pentry->name, irq);
if (pdev == NULL) {
pr_err("out of memory for SFI platform device '%s'.\n",
pentry->name);
continue;
}
- install_irq_resource(pdev, pentry->irq);
+ install_irq_resource(pdev, irq);
pr_debug("info[%2d]: IPC bus, name = %16.16s, "
- "irq = 0x%2x\n", i, pentry->name, pentry->irq);
+ "irq = 0x%2x\n", i, pentry->name, irq);
sfi_handle_ipc_dev(pdev);
break;
case SFI_DEV_TYPE_SPI:
memset(&spi_info, 0, sizeof(spi_info));
strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN);
- spi_info.irq = pentry->irq;
+ spi_info.irq = irq;
spi_info.bus_num = pentry->host_num;
spi_info.chip_select = pentry->addr;
spi_info.max_speed_hz = pentry->max_freq;
memset(&i2c_info, 0, sizeof(i2c_info));
bus = pentry->host_num;
strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN);
- i2c_info.irq = pentry->irq;
+ i2c_info.irq = irq;
i2c_info.addr = pentry->addr;
pr_debug("info[%2d]: I2C bus = %d, name = %16.16s, "
"irq = 0x%2x, addr = 0x%x\n", i, bus,
if STAGING
+ source "drivers/staging/serial/Kconfig"
+
source "drivers/staging/et131x/Kconfig"
source "drivers/staging/slicoss/Kconfig"
source "drivers/staging/echo/Kconfig"
-source "drivers/staging/brcm80211/Kconfig"
+
source "drivers/staging/comedi/Kconfig"
source "drivers/staging/sbe-2t3e3/Kconfig"
-source "drivers/staging/ath6kl/Kconfig"
-
source "drivers/staging/keucr/Kconfig"
source "drivers/staging/bcm/Kconfig"
# fix for build system bug...
obj-$(CONFIG_STAGING) += staging.o
+ obj-y += serial/
obj-$(CONFIG_ET131X) += et131x/
obj-$(CONFIG_SLICOSS) += slicoss/
obj-$(CONFIG_VIDEO_GO7007) += go7007/
obj-$(CONFIG_W35UND) += winbond/
obj-$(CONFIG_PRISM2_USB) += wlan-ng/
obj-$(CONFIG_ECHO) += echo/
-obj-$(CONFIG_BRCMSMAC) += brcm80211/
-obj-$(CONFIG_BRCMFMAC) += brcm80211/
+
+
obj-$(CONFIG_COMEDI) += comedi/
obj-$(CONFIG_FB_OLPC_DCON) += olpc_dcon/
obj-$(CONFIG_ASUS_OLED) += asus_oled/
obj-$(CONFIG_TIDSPBRIDGE) += tidspbridge/
obj-$(CONFIG_ACPI_QUICKSTART) += quickstart/
obj-$(CONFIG_SBE_2T3E3) += sbe-2t3e3/
-obj-$(CONFIG_ATH6K_LEGACY) += ath6kl/
obj-$(CONFIG_USB_ENESTORAGE) += keucr/
obj-$(CONFIG_BCM_WIMAX) += bcm/
obj-$(CONFIG_FT1000) += ft1000/
If unsure, say Y.
+config VT_CONSOLE_SLEEP
+ def_bool y
+ depends on VT_CONSOLE && PM_SLEEP
+
config HW_CONSOLE
bool
- depends on VT && !S390 && !UML
+ depends on VT && !UML
default y
config VT_HW_CONSOLE_BINDING
If you select this option, you need to select
"Trace data router for MIPI P1149.7 cJTAG standard".
+
+ config PPC_EPAPR_HV_BYTECHAN
+ tristate "ePAPR hypervisor byte channel driver"
+ depends on PPC
+ help
+ This driver creates /dev entries for each ePAPR hypervisor byte
+ channel, thereby allowing applications to communicate with byte
+ channels as if they were serial ports.
+
+ config PPC_EARLY_DEBUG_EHV_BC
+ bool "Early console (udbg) support for ePAPR hypervisors"
+ depends on PPC_EPAPR_HV_BYTECHAN
+ help
+ Select this option to enable early console (a.k.a. "udbg") support
+ via an ePAPR byte channel. You also need to choose the byte channel
+ handle below.
+
+ config PPC_EARLY_DEBUG_EHV_BC_HANDLE
+ int "Byte channel handle for early console (udbg)"
+ depends on PPC_EARLY_DEBUG_EHV_BC
+ default 0
+ help
+ If you want early console (udbg) output through a byte channel,
+ specify the handle of the byte channel to use.
+
+ For this to work, the byte channel driver must be compiled
+ in-kernel, not as a module.
+
+ Note that only one early console driver can be enabled, so don't
+ enable any others if you enable this one.
+
+ If the number you specify is not a valid byte channel handle, then
+ there simply will be no early console output. This is true also
+ if you don't boot under a hypervisor at all.
int pty_limit = NR_UNIX98_PTY_DEFAULT;
static int pty_limit_min;
static int pty_limit_max = NR_UNIX98_PTY_MAX;
+static int tty_count;
static int pty_count;
+static inline void pty_inc_count(void)
+{
+ pty_count = (++tty_count) / 2;
+}
+
+static inline void pty_dec_count(void)
+{
+ pty_count = (--tty_count) / 2;
+}
+
static struct cdev ptmx_cdev;
static struct ctl_table pty_table[] = {
static void pty_unix98_shutdown(struct tty_struct *tty)
{
+ tty_driver_remove_tty(tty->driver, tty);
/* We have our own method as we don't use the tty index */
kfree(tty->termios);
}
*/
tty_driver_kref_get(driver);
tty->count++;
- pty_count++;
+ pty_inc_count(); /* tty */
+ pty_inc_count(); /* tty->link */
return 0;
err_free_mem:
deinitialize_tty_struct(o_tty);
static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
{
- pty_count--;
+ pty_dec_count();
}
static const struct tty_operations ptm_unix98_ops = {
nonseekable_open(inode, filp);
+ retval = tty_alloc_file(filp);
+ if (retval)
+ return retval;
+
/* find a device that is not in use. */
tty_lock();
index = devpts_new_index(inode);
tty_unlock();
- if (index < 0)
- return index;
+ if (index < 0) {
+ retval = index;
+ goto err_file;
+ }
mutex_lock(&tty_mutex);
tty_lock();
set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
- retval = tty_add_file(tty, filp);
- if (retval)
- goto out;
+ tty_add_file(tty, filp);
retval = devpts_pty_new(inode, tty->link);
if (retval)
- goto out1;
+ goto err_release;
retval = ptm_driver->ops->open(tty, filp);
if (retval)
- goto out2;
- out1:
+ goto err_release;
+
tty_unlock();
- return retval;
- out2:
+ return 0;
+ err_release:
tty_unlock();
tty_release(inode, filp);
return retval;
out:
devpts_kill_index(inode, index);
tty_unlock();
+ err_file:
+ tty_free_file(filp);
return retval;
}
UART_FCR_T_TRIG_01,
.flags = UART_CAP_FIFO | UART_CAP_RTOIE,
},
+ [PORT_XR17D15X] = {
+ .name = "XR17D15X",
+ .fifo_size = 64,
+ .tx_loadsz = 64,
+ .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+ .flags = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR,
+ },
};
#if defined(CONFIG_MIPS_ALCHEMY)
writeb(value, p->membase + offset);
}
- /* Save the LCR value so it can be re-written when a Busy Detect IRQ occurs. */
- static inline void dwapb_save_out_value(struct uart_port *p, int offset,
- int value)
- {
- struct uart_8250_port *up =
- container_of(p, struct uart_8250_port, port);
-
- if (offset == UART_LCR)
- up->lcr = value;
- }
-
- /* Read the IER to ensure any interrupt is cleared before returning from ISR. */
- static inline void dwapb_check_clear_ier(struct uart_port *p, int offset)
- {
- if (offset == UART_TX || offset == UART_IER)
- p->serial_in(p, UART_IER);
- }
-
- static void dwapb_serial_out(struct uart_port *p, int offset, int value)
- {
- int save_offset = offset;
- offset = map_8250_out_reg(p, offset) << p->regshift;
- dwapb_save_out_value(p, save_offset, value);
- writeb(value, p->membase + offset);
- dwapb_check_clear_ier(p, save_offset);
- }
-
- static void dwapb32_serial_out(struct uart_port *p, int offset, int value)
- {
- int save_offset = offset;
- offset = map_8250_out_reg(p, offset) << p->regshift;
- dwapb_save_out_value(p, save_offset, value);
- writel(value, p->membase + offset);
- dwapb_check_clear_ier(p, save_offset);
- }
-
static unsigned int io_serial_in(struct uart_port *p, int offset)
{
offset = map_8250_in_reg(p, offset) << p->regshift;
outb(value, p->iobase + offset);
}
+ static int serial8250_default_handle_irq(struct uart_port *port);
+
static void set_io_from_upio(struct uart_port *p)
{
struct uart_8250_port *up =
p->serial_out = tsi_serial_out;
break;
- case UPIO_DWAPB:
- p->serial_in = mem_serial_in;
- p->serial_out = dwapb_serial_out;
- break;
-
- case UPIO_DWAPB32:
- p->serial_in = mem32_serial_in;
- p->serial_out = dwapb32_serial_out;
- break;
-
default:
p->serial_in = io_serial_in;
p->serial_out = io_serial_out;
}
/* Remember loaded iotype */
up->cur_iotype = p->iotype;
+ p->handle_irq = serial8250_default_handle_irq;
}
static void
case UPIO_MEM:
case UPIO_MEM32:
case UPIO_AU:
- case UPIO_DWAPB:
- case UPIO_DWAPB32:
p->serial_out(p, offset, value);
p->serial_in(p, UART_LCR); /* safe, no side-effects */
break;
}
serial_outp(up, UART_IER, iersave);
+ /*
+ * Exar uarts have EFR in a weird location
+ */
+ if (up->port.flags & UPF_EXAR_EFR) {
+ up->port.type = PORT_XR17D15X;
+ up->capabilities |= UART_CAP_AFE | UART_CAP_EFR;
+ }
+
/*
* We distinguish between 16550A and U6 16550A by counting
* how many bytes are in the FIFO.
spin_unlock_irqrestore(&up->port.lock, flags);
}
+ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
+ {
+ struct uart_8250_port *up =
+ container_of(port, struct uart_8250_port, port);
+
+ if (!(iir & UART_IIR_NO_INT)) {
+ serial8250_handle_port(up);
+ return 1;
+ }
+
+ return 0;
+ }
+ EXPORT_SYMBOL_GPL(serial8250_handle_irq);
+
+ static int serial8250_default_handle_irq(struct uart_port *port)
+ {
+ struct uart_8250_port *up =
+ container_of(port, struct uart_8250_port, port);
+ unsigned int iir = serial_in(up, UART_IIR);
+
+ return serial8250_handle_irq(port, iir);
+ }
+
/*
* This is the serial driver's interrupt routine.
*
l = i->head;
do {
struct uart_8250_port *up;
- unsigned int iir;
+ struct uart_port *port;
up = list_entry(l, struct uart_8250_port, list);
+ port = &up->port;
- iir = serial_in(up, UART_IIR);
- if (!(iir & UART_IIR_NO_INT)) {
- serial8250_handle_port(up);
-
+ if (port->handle_irq(port)) {
handled = 1;
-
- end = NULL;
- } else if ((up->port.iotype == UPIO_DWAPB ||
- up->port.iotype == UPIO_DWAPB32) &&
- (iir & UART_IIR_BUSY) == UART_IIR_BUSY) {
- /* The DesignWare APB UART has an Busy Detect (0x07)
- * interrupt meaning an LCR write attempt occurred while the
- * UART was busy. The interrupt must be cleared by reading
- * the UART status register (USR) and the LCR re-written. */
- unsigned int status;
- status = *(volatile u32 *)up->port.private_data;
- serial_out(up, UART_LCR, up->lcr);
-
- handled = 1;
-
end = NULL;
} else if (end == NULL)
end = l;
unsigned int iir, ier = 0, lsr;
unsigned long flags;
+ spin_lock_irqsave(&up->port.lock, flags);
+
/*
* Must disable interrupts or else we risk racing with the interrupt
* based handler.
* 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.state->xmit) || up->port.x_char) &&
(lsr & UART_LSR_THRE)) {
}
if (!(iir & UART_IIR_NO_INT))
- serial8250_handle_port(up);
+ transmit_chars(up);
if (is_real_interrupt(up->port.irq))
serial_out(up, UART_IER, ier);
+ spin_unlock_irqrestore(&up->port.lock, flags);
+
/* Standard timer interval plus 0.2s to keep the port running */
mod_timer(&up->timer,
jiffies + uart_poll_timeout(&up->port) + HZ / 5);
*/
if (!(up->port.flags & UPF_BUGGY_UART) &&
(serial_inp(up, UART_LSR) == 0xff)) {
- printk(KERN_INFO "ttyS%d: LSR safety check engaged!\n",
- serial_index(&up->port));
+ printk_ratelimited(KERN_INFO "ttyS%d: LSR safety check engaged!\n",
+ serial_index(&up->port));
return -ENODEV;
}
efr |= UART_EFR_CTS;
serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B);
- serial_outp(up, UART_EFR, efr);
+ if (up->port.flags & UPF_EXAR_EFR)
+ serial_outp(up, UART_XR_EFR, efr);
+ else
+ serial_outp(up, UART_EFR, efr);
}
#ifdef CONFIG_ARCH_OMAP
case UPIO_TSI:
case UPIO_MEM32:
case UPIO_MEM:
- case UPIO_DWAPB:
- case UPIO_DWAPB32:
if (!up->port.mapbase)
break;
case UPIO_TSI:
case UPIO_MEM32:
case UPIO_MEM:
- case UPIO_DWAPB:
- case UPIO_DWAPB32:
if (!up->port.mapbase)
break;
p->serial_in = port->serial_in;
if (port->serial_out)
p->serial_out = port->serial_out;
+ if (port->handle_irq)
+ p->handle_irq = port->handle_irq;
+ else
+ p->handle_irq = serial8250_default_handle_irq;
return 0;
}
port.type = p->type;
port.serial_in = p->serial_in;
port.serial_out = p->serial_out;
+ port.handle_irq = p->handle_irq;
port.set_termios = p->set_termios;
port.pm = p->pm;
port.dev = &dev->dev;
uart->port.serial_in = port->serial_in;
if (port->serial_out)
uart->port.serial_out = port->serial_out;
+ if (port->handle_irq)
+ uart->port.handle_irq = port->handle_irq;
/* Possibly override set_termios call */
if (port->set_termios)
uart->port.set_termios = port->set_termios;
#endif
}
+ static int
+ pci_xr17c154_setup(struct serial_private *priv,
+ const struct pciserial_board *board,
+ struct uart_port *port, int idx)
+ {
+ port->flags |= UPF_EXAR_EFR;
+ return pci_default_setup(priv, board, port, idx);
+ }
+
/* This should be in linux/pci_ids.h */
#define PCI_VENDOR_ID_SBSMODULARIO 0x124B
#define PCI_SUBVENDOR_ID_SBSMODULARIO 0x124B
.subdevice = PCI_ANY_ID,
.setup = pci_timedia_setup,
},
+ /*
+ * Exar cards
+ */
+ {
+ .vendor = PCI_VENDOR_ID_EXAR,
+ .device = PCI_DEVICE_ID_EXAR_XR17C152,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .setup = pci_xr17c154_setup,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_EXAR,
+ .device = PCI_DEVICE_ID_EXAR_XR17C154,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .setup = pci_xr17c154_setup,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_EXAR,
+ .device = PCI_DEVICE_ID_EXAR_XR17C158,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .setup = pci_xr17c154_setup,
+ },
/*
* Xircom cards
*/
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8811,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8812,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8813,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x8814,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x8027,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x8028,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x8029,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x800C,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
{
.vendor = 0x10DB,
.device = 0x800D,
.init = pci_eg20t_init,
+ .setup = pci_default_setup,
},
- {
- .vendor = 0x10DB,
- .device = 0x800D,
- .init = pci_eg20t_init,
- .setup = pci_default_setup,
- },
/*
* Cronyx Omega PCI (PLX-chip based)
*/
0, 0, pbn_NETMOS9900_2s_115200 },
/*
- * Best Connectivity PCI Multi I/O cards
+ * Best Connectivity and Rosewill PCI Multi I/O cards
*/
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
0xA000, 0x1000,
0, 0, pbn_b0_1_115200 },
+ { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
+ 0xA000, 0x3002,
+ 0, 0, pbn_b0_bt_2_115200 },
+
{ PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
0xA000, 0x3004,
0, 0, pbn_b0_bt_4_115200 },
#include <linux/sysrq.h>
#include <linux/tty_flip.h>
#include <linux/platform_device.h>
+ #include <linux/of.h>
+ #include <linux/of_device.h>
#include <linux/dma-mapping.h>
#include <linux/atmel_pdc.h>
#include <linux/atmel_serial.h>
};
static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
+ static unsigned long atmel_ports_in_use;
#ifdef SUPPORT_SYSRQ
static struct console atmel_console;
#endif
+ #if defined(CONFIG_OF)
+ static const struct of_device_id atmel_serial_dt_ids[] = {
+ { .compatible = "atmel,at91rm9200-usart" },
+ { .compatible = "atmel,at91sam9260-usart" },
+ { /* sentinel */ }
+ };
+
+ MODULE_DEVICE_TABLE(of, atmel_serial_dt_ids);
+ #endif
+
static inline struct atmel_uart_port *
to_atmel_uart_port(struct uart_port *uart)
{
/* Disable interrupts */
UART_PUT_IDR(port, atmel_port->tx_done_mask);
- if (atmel_port->rs485.flags & SER_RS485_ENABLED)
+ if ((atmel_port->rs485.flags & SER_RS485_ENABLED) &&
+ !(atmel_port->rs485.flags & SER_RS485_RX_DURING_TX))
atmel_start_rx(port);
}
really need this.*/
return;
- if (atmel_port->rs485.flags & SER_RS485_ENABLED)
+ if ((atmel_port->rs485.flags & SER_RS485_ENABLED) &&
+ !(atmel_port->rs485.flags & SER_RS485_RX_DURING_TX))
atmel_stop_rx(port);
/* re-enable PDC transmit */
/* Enable interrupts */
UART_PUT_IER(port, atmel_port->tx_done_mask);
} else {
- if (atmel_port->rs485.flags & SER_RS485_ENABLED) {
+ if ((atmel_port->rs485.flags & SER_RS485_ENABLED) &&
+ !(atmel_port->rs485.flags & SER_RS485_RX_DURING_TX)) {
/* DMA done, stop TX, start RX for RS485 */
atmel_start_rx(port);
}
#endif
};
+ static void __devinit atmel_of_init_port(struct atmel_uart_port *atmel_port,
+ struct device_node *np)
+ {
+ u32 rs485_delay[2];
+
+ /* DMA/PDC usage specification */
+ if (of_get_property(np, "atmel,use-dma-rx", NULL))
+ atmel_port->use_dma_rx = 1;
+ else
+ atmel_port->use_dma_rx = 0;
+ if (of_get_property(np, "atmel,use-dma-tx", NULL))
+ atmel_port->use_dma_tx = 1;
+ else
+ atmel_port->use_dma_tx = 0;
+
+ /* rs485 properties */
+ if (of_property_read_u32_array(np, "rs485-rts-delay",
+ rs485_delay, 2) == 0) {
+ struct serial_rs485 *rs485conf = &atmel_port->rs485;
+
+ rs485conf->delay_rts_before_send = rs485_delay[0];
+ rs485conf->delay_rts_after_send = rs485_delay[1];
+ rs485conf->flags = 0;
+
+ if (rs485conf->delay_rts_before_send == 0 &&
+ rs485conf->delay_rts_after_send == 0) {
+ rs485conf->flags |= SER_RS485_RTS_ON_SEND;
+ } else {
+ if (rs485conf->delay_rts_before_send)
+ rs485conf->flags |= SER_RS485_RTS_BEFORE_SEND;
+ if (rs485conf->delay_rts_after_send)
+ rs485conf->flags |= SER_RS485_RTS_AFTER_SEND;
+ }
+
+ if (of_get_property(np, "rs485-rx-during-tx", NULL))
+ rs485conf->flags |= SER_RS485_RX_DURING_TX;
+
+ if (of_get_property(np, "linux,rs485-enabled-at-boot-time", NULL))
+ rs485conf->flags |= SER_RS485_ENABLED;
+ }
+ }
+
/*
* Configure the port from the platform device resource info.
*/
struct platform_device *pdev)
{
struct uart_port *port = &atmel_port->uart;
- struct atmel_uart_data *data = pdev->dev.platform_data;
+ struct atmel_uart_data *pdata = pdev->dev.platform_data;
+
+ if (pdev->dev.of_node) {
+ atmel_of_init_port(atmel_port, pdev->dev.of_node);
+ } else {
+ atmel_port->use_dma_rx = pdata->use_dma_rx;
+ atmel_port->use_dma_tx = pdata->use_dma_tx;
+ atmel_port->rs485 = pdata->rs485;
+ }
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF;
port->ops = &atmel_pops;
port->fifosize = 1;
- port->line = data->num;
port->dev = &pdev->dev;
port->mapbase = pdev->resource[0].start;
port->irq = pdev->resource[1].start;
memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));
- if (data->regs)
+ if (pdata && pdata->regs) {
/* Already mapped by setup code */
- port->membase = data->regs;
- else {
+ port->membase = pdata->regs;
+ } else {
port->flags |= UPF_IOREMAP;
port->membase = NULL;
}
/* only enable clock when USART is in use */
}
- atmel_port->use_dma_rx = data->use_dma_rx;
- atmel_port->use_dma_tx = data->use_dma_tx;
- atmel_port->rs485 = data->rs485;
/* Use TXEMPTY for interrupt when rs485 else TXRDY or ENDTX|TXBUFE */
if (atmel_port->rs485.flags & SER_RS485_ENABLED)
atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
static int __init atmel_console_init(void)
{
if (atmel_default_console_device) {
- int id = atmel_default_console_device->id;
+ struct atmel_uart_data *pdata =
+ atmel_default_console_device->dev.platform_data;
++ int id = pdata->num;
+ struct atmel_uart_port *port = &atmel_ports[id];
+
+ port->backup_imr = 0;
+ port->uart.line = id;
- add_preferred_console(ATMEL_DEVICENAME, pdata->num, NULL);
- atmel_init_port(&atmel_ports[pdata->num],
- atmel_default_console_device);
+ add_preferred_console(ATMEL_DEVICENAME, id, NULL);
+ atmel_init_port(port, atmel_default_console_device);
register_console(&atmel_console);
}
static int __devinit atmel_serial_probe(struct platform_device *pdev)
{
struct atmel_uart_port *port;
+ struct device_node *np = pdev->dev.of_node;
struct atmel_uart_data *pdata = pdev->dev.platform_data;
void *data;
- int ret;
+ int ret = -ENODEV;
BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1));
- port = &atmel_ports[pdata->num];
+ if (np)
+ ret = of_alias_get_id(np, "serial");
+ else
+ if (pdata)
+ ret = pdata->num;
+
+ if (ret < 0)
+ /* port id not found in platform data nor device-tree aliases:
+ * auto-enumerate it */
+ ret = find_first_zero_bit(&atmel_ports_in_use,
+ sizeof(atmel_ports_in_use));
+
+ if (ret > ATMEL_MAX_UART) {
+ ret = -ENODEV;
+ goto err;
+ }
+
+ if (test_and_set_bit(ret, &atmel_ports_in_use)) {
+ /* port already in use */
+ ret = -EBUSY;
+ goto err;
+ }
+
+ port = &atmel_ports[ret];
port->backup_imr = 0;
+ port->uart.line = ret;
atmel_init_port(port, pdev);
clk_put(port->clk);
port->clk = NULL;
}
-
+ err:
return ret;
}
/* "port" is allocated statically, so we shouldn't free it */
+ clear_bit(port->line, &atmel_ports_in_use);
+
clk_put(atmel_port->clk);
return ret;
.driver = {
.name = "atmel_usart",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(atmel_serial_dt_ids),
},
};
ASCCON_ROEN, port->membase + LTQ_ASC_CON);
retval = request_irq(ltq_port->tx_irq, lqasc_tx_int,
- IRQF_DISABLED, "asc_tx", port);
+ 0, "asc_tx", port);
if (retval) {
pr_err("failed to request lqasc_tx_int\n");
return retval;
}
retval = request_irq(ltq_port->rx_irq, lqasc_rx_int,
- IRQF_DISABLED, "asc_rx", port);
+ 0, "asc_rx", port);
if (retval) {
pr_err("failed to request lqasc_rx_int\n");
goto err1;
}
retval = request_irq(ltq_port->err_irq, lqasc_err_int,
- IRQF_DISABLED, "asc_err", port);
+ 0, "asc_err", port);
if (retval) {
pr_err("failed to request lqasc_err_int\n");
goto err2;
spin_unlock_irqrestore(<q_asc_lock, flags);
/* Don't rewrite B0 */
- if (tty_termios_baud_rate(new))
+ if (tty_termios_baud_rate(new))
tty_termios_encode_baud_rate(new, baud, baud);
+
+ uart_update_timeout(port, cflag, baud);
}
static const char*
#include <linux/device.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
+ #include <linux/tty.h>
+ #include <linux/tty_flip.h>
#include <linux/gpio.h>
#include <linux/spi/spi.h>
#include <linux/freezer.h>
MODULE_DESCRIPTION("MAX3107 driver");
MODULE_AUTHOR("Aavamobile");
-MODULE_ALIAS("max3107-spi");
+MODULE_ALIAS("spi:max3107");
MODULE_LICENSE("GPL v2");
* 1 word. If SPI master controller doesn't support sclk frequency change,
* then the char need be sent out one by one with some delay
*
- * 2. Currently only RX available interrrupt is used, no need for waiting TXE
+ * 2. Currently only RX available interrupt is used, no need for waiting TXE
* interrupt for a low speed UART device
*/
+ #ifdef CONFIG_MAGIC_SYSRQ
+ #define SUPPORT_SYSRQ
+ #endif
+
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/irq.h>
/* global data structure, may need be removed */
static struct uart_max3110 *pmax;
- static void receive_chars(struct uart_max3110 *max,
- unsigned char *str, int len);
- static int max3110_read_multi(struct uart_max3110 *max, u8 *buf);
+ static int receive_chars(struct uart_max3110 *max,
+ unsigned short *str, int len);
+ static int max3110_read_multi(struct uart_max3110 *max);
static void max3110_con_receive(struct uart_max3110 *max);
static int max3110_write_then_read(struct uart_max3110 *max,
{
void *buf;
u16 *obuf, *ibuf;
- u8 ch;
int ret;
buf = kzalloc(8, GFP_KERNEL | GFP_DMA);
goto exit;
}
- /* If some valid data is read back */
- if (*ibuf & MAX3110_READ_DATA_AVAILABLE) {
- ch = *ibuf & 0xff;
- receive_chars(max, &ch, 1);
- }
+ receive_chars(max, ibuf, 1);
exit:
kfree(buf);
*
* Return how many valide bytes are read back
*/
- static int max3110_read_multi(struct uart_max3110 *max, u8 *rxbuf)
+ static int max3110_read_multi(struct uart_max3110 *max)
{
void *buf;
u16 *obuf, *ibuf;
- u8 *pbuf, valid_str[M3110_RX_FIFO_DEPTH];
- int i, j, blen;
+ int ret, blen;
blen = M3110_RX_FIFO_DEPTH * sizeof(u16);
buf = kzalloc(blen * 2, GFP_KERNEL | GFP_DMA);
return 0;
}
- /* If caller doesn't provide a buffer, then handle received char */
- pbuf = rxbuf ? rxbuf : valid_str;
-
- for (i = 0, j = 0; i < M3110_RX_FIFO_DEPTH; i++) {
- if (ibuf[i] & MAX3110_READ_DATA_AVAILABLE)
- pbuf[j++] = ibuf[i] & 0xff;
- }
-
- if (j && (pbuf == valid_str))
- receive_chars(max, valid_str, j);
+ ret = receive_chars(max, ibuf, M3110_RX_FIFO_DEPTH);
kfree(buf);
- return j;
+ return ret;
}
static void serial_m3110_con_putchar(struct uart_port *port, int ch)
uart_console_write(&pmax->port, s, count, serial_m3110_con_putchar);
if (!test_and_set_bit(CON_TX_NEEDED, &pmax->uart_flags))
- wake_up_process(pmax->main_thread);
+ wake_up(&pmax->wq);
}
static int __init
{
void *buf;
u16 *obuf, *ibuf;
- u8 valid_str[WORDS_PER_XFER];
- int i, j, len, blen, dma_size, left, ret = 0;
+ int i, len, blen, dma_size, left, ret = 0;
dma_size = WORDS_PER_XFER * sizeof(u16) * 2;
}
/* Fail to send msg to console is not very critical */
+
ret = max3110_write_then_read(max, obuf, ibuf, blen, 0);
if (ret)
pr_warning(PR_FMT "%s(): get err msg %d\n",
__func__, ret);
- for (i = 0, j = 0; i < len; i++) {
- if (ibuf[i] & MAX3110_READ_DATA_AVAILABLE)
- valid_str[j++] = ibuf[i] & 0xff;
- }
-
- if (j)
- receive_chars(max, valid_str, j);
+ receive_chars(max, ibuf, len);
max->port.icount.tx += len;
left -= len;
container_of(port, struct uart_max3110, port);
if (!test_and_set_bit(UART_TX_NEEDED, &max->uart_flags))
- wake_up_process(max->main_thread);
+ wake_up(&max->wq);
}
- static void receive_chars(struct uart_max3110 *max, unsigned char *str, int len)
+ static int
+ receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
{
struct uart_port *port = &max->port;
struct tty_struct *tty;
- int usable;
+ char buf[M3110_RX_FIFO_DEPTH];
+ int r, w, usable;
/* If uart is not opened, just return */
if (!port->state)
- return;
+ return 0;
- tty = port->state->port.tty;
+ tty = tty_port_tty_get(&port->state->port);
if (!tty)
- return;
+ return 0;
- while (len) {
- usable = tty_buffer_request_room(tty, len);
+ for (r = 0, w = 0; r < len; r++) {
+ if (str[r] & MAX3110_BREAK &&
+ uart_handle_break(port))
+ continue;
+
+ if (str[r] & MAX3110_READ_DATA_AVAILABLE) {
+ if (uart_handle_sysrq_char(port, str[r] & 0xff))
+ continue;
+
+ buf[w++] = str[r] & 0xff;
+ }
+ }
+
+ if (!w) {
+ tty_kref_put(tty);
+ return 0;
+ }
+
+ for (r = 0; w; r += usable, w -= usable) {
+ usable = tty_buffer_request_room(tty, w);
if (usable) {
- tty_insert_flip_string(tty, str, usable);
- str += usable;
+ tty_insert_flip_string(tty, buf + r, usable);
port->icount.rx += usable;
}
- len -= usable;
}
tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
+
+ return r;
}
/*
*/
static void max3110_con_receive(struct uart_max3110 *max)
{
- int loop = 1, num, total = 0;
- u8 recv_buf[512], *pbuf;
+ int loop = 1, num;
- pbuf = recv_buf;
do {
- num = max3110_read_multi(max, pbuf);
+ num = max3110_read_multi(max);
if (num) {
loop = 5;
- pbuf += num;
- total += num;
-
- if (total >= 504) {
- receive_chars(max, recv_buf, total);
- pbuf = recv_buf;
- total = 0;
- }
}
} while (--loop);
-
- if (total)
- receive_chars(max, recv_buf, total);
}
static int max3110_main_thread(void *_max)
pr_info(PR_FMT "start main thread\n");
do {
- wait_event_interruptible(*wq, max->uart_flags || kthread_should_stop());
+ wait_event_interruptible(*wq,
+ max->uart_flags || kthread_should_stop());
mutex_lock(&max->thread_mutex);
/* max3110's irq is a falling edge, not level triggered,
* so no need to disable the irq */
+
if (!test_and_set_bit(BIT_IRQ_PENDING, &max->uart_flags))
- wake_up_process(max->main_thread);
+ wake_up(&max->wq);
return IRQ_HANDLED;
}
module_exit(serial_m3110_exit);
MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("max3110-uart");
+MODULE_ALIAS("spi:max3110-uart");
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/serial_core.h>
+ #include <linux/tty.h>
+ #include <linux/tty_flip.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/dmi.h>
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- dma_dev = pci_get_bus_and_slot(2, PCI_DEVFN(0xa, 0)); /* Get DMA's dev
+ dma_dev = pci_get_bus_and_slot(priv->pdev->bus->number,
+ PCI_DEVFN(0xa, 0)); /* Get DMA's dev
information */
/* Set Tx DMA */
param = &priv->param_tx;
return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE);
}
+ /*
+ * s3c64xx and later SoC's include the interrupt mask and status registers in
+ * the controller itself, unlike the s3c24xx SoC's which have these registers
+ * in the interrupt controller. Check if the port type is s3c64xx or higher.
+ */
+ static int s3c24xx_serial_has_interrupt_mask(struct uart_port *port)
+ {
+ return to_ourport(port)->info->type == PORT_S3C6400;
+ }
+
static void s3c24xx_serial_rx_enable(struct uart_port *port)
{
unsigned long flags;
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (tx_enabled(port)) {
- disable_irq_nosync(ourport->tx_irq);
+ if (s3c24xx_serial_has_interrupt_mask(port))
+ __set_bit(S3C64XX_UINTM_TXD,
+ portaddrl(port, S3C64XX_UINTM));
+ else
+ disable_irq_nosync(ourport->tx_irq);
tx_enabled(port) = 0;
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_enable(port);
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_disable(port);
- enable_irq(ourport->tx_irq);
+ if (s3c24xx_serial_has_interrupt_mask(port))
+ __clear_bit(S3C64XX_UINTM_TXD,
+ portaddrl(port, S3C64XX_UINTM));
+ else
+ enable_irq(ourport->tx_irq);
tx_enabled(port) = 1;
}
}
-
static void s3c24xx_serial_stop_rx(struct uart_port *port)
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (rx_enabled(port)) {
dbg("s3c24xx_serial_stop_rx: port=%p\n", port);
- disable_irq_nosync(ourport->rx_irq);
+ if (s3c24xx_serial_has_interrupt_mask(port))
+ __set_bit(S3C64XX_UINTM_RXD,
+ portaddrl(port, S3C64XX_UINTM));
+ else
+ disable_irq_nosync(ourport->rx_irq);
rx_enabled(port) = 0;
}
}
return IRQ_HANDLED;
}
+ /* interrupt handler for s3c64xx and later SoC's.*/
+ static irqreturn_t s3c64xx_serial_handle_irq(int irq, void *id)
+ {
+ struct s3c24xx_uart_port *ourport = id;
+ struct uart_port *port = &ourport->port;
+ unsigned int pend = rd_regl(port, S3C64XX_UINTP);
+ unsigned long flags;
+ irqreturn_t ret = IRQ_HANDLED;
+
+ spin_lock_irqsave(&port->lock, flags);
+ if (pend & S3C64XX_UINTM_RXD_MSK) {
+ ret = s3c24xx_serial_rx_chars(irq, id);
+ wr_regl(port, S3C64XX_UINTP, S3C64XX_UINTM_RXD_MSK);
+ }
+ if (pend & S3C64XX_UINTM_TXD_MSK) {
+ ret = s3c24xx_serial_tx_chars(irq, id);
+ wr_regl(port, S3C64XX_UINTP, S3C64XX_UINTM_TXD_MSK);
+ }
+ spin_unlock_irqrestore(&port->lock, flags);
+ return ret;
+ }
+
static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port)
{
struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (ourport->tx_claimed) {
- free_irq(ourport->tx_irq, ourport);
+ if (!s3c24xx_serial_has_interrupt_mask(port))
+ free_irq(ourport->tx_irq, ourport);
tx_enabled(port) = 0;
ourport->tx_claimed = 0;
}
if (ourport->rx_claimed) {
- free_irq(ourport->rx_irq, ourport);
+ if (!s3c24xx_serial_has_interrupt_mask(port))
+ free_irq(ourport->rx_irq, ourport);
ourport->rx_claimed = 0;
rx_enabled(port) = 0;
}
- }
+ /* Clear pending interrupts and mask all interrupts */
+ if (s3c24xx_serial_has_interrupt_mask(port)) {
+ wr_regl(port, S3C64XX_UINTP, 0xf);
+ wr_regl(port, S3C64XX_UINTM, 0xf);
+ }
+ }
static int s3c24xx_serial_startup(struct uart_port *port)
{
return ret;
}
+ static int s3c64xx_serial_startup(struct uart_port *port)
+ {
+ struct s3c24xx_uart_port *ourport = to_ourport(port);
+ int ret;
+
+ dbg("s3c64xx_serial_startup: port=%p (%08lx,%p)\n",
+ port->mapbase, port->membase);
+
+ ret = request_irq(port->irq, s3c64xx_serial_handle_irq, IRQF_SHARED,
+ s3c24xx_serial_portname(port), ourport);
+ if (ret) {
+ printk(KERN_ERR "cannot get irq %d\n", port->irq);
+ return ret;
+ }
+
+ /* For compatibility with s3c24xx Soc's */
+ rx_enabled(port) = 1;
+ ourport->rx_claimed = 1;
+ tx_enabled(port) = 0;
+ ourport->tx_claimed = 1;
+
+ /* Enable Rx Interrupt */
+ __clear_bit(S3C64XX_UINTM_RXD, portaddrl(port, S3C64XX_UINTM));
+ dbg("s3c64xx_serial_startup ok\n");
+ return ret;
+ }
+
/* power power management control */
static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
.verify_port = s3c24xx_serial_verify_port,
};
-
static struct uart_driver s3c24xx_uart_drv = {
.owner = THIS_MODULE,
.driver_name = "s3c2410_serial",
.port = {
.lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock),
.iotype = UPIO_MEM,
- .irq = IRQ_S3CUART_RX0,
.uartclk = 0,
.fifosize = 16,
.ops = &s3c24xx_serial_ops,
.port = {
.lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock),
.iotype = UPIO_MEM,
- .irq = IRQ_S3CUART_RX1,
.uartclk = 0,
.fifosize = 16,
.ops = &s3c24xx_serial_ops,
.port = {
.lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock),
.iotype = UPIO_MEM,
- .irq = IRQ_S3CUART_RX2,
.uartclk = 0,
.fifosize = 16,
.ops = &s3c24xx_serial_ops,
.port = {
.lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[3].port.lock),
.iotype = UPIO_MEM,
- .irq = IRQ_S3CUART_RX3,
.uartclk = 0,
.fifosize = 16,
.ops = &s3c24xx_serial_ops,
port->dev = &platdev->dev;
ourport->info = info;
+ /* Startup sequence is different for s3c64xx and higher SoC's */
+ if (s3c24xx_serial_has_interrupt_mask(port))
+ s3c24xx_serial_ops.startup = s3c64xx_serial_startup;
+
/* copy the info in from provided structure */
ourport->port.fifosize = info->fifosize;
ourport->clk = clk_get(&platdev->dev, "uart");
+ /* Keep all interrupts masked and cleared */
+ if (s3c24xx_serial_has_interrupt_mask(port)) {
+ wr_regl(port, S3C64XX_UINTM, 0xf);
+ wr_regl(port, S3C64XX_UINTP, 0xf);
+ wr_regl(port, S3C64XX_UINTSP, 0xf);
+ }
+
dbg("port: map=%08x, mem=%08x, irq=%d (%d,%d), clock=%ld\n",
port->mapbase, port->membase, port->irq,
ourport->rx_irq, ourport->tx_irq, port->uartclk);
.suspend = s3c24xx_serial_suspend,
.resume = s3c24xx_serial_resume,
};
+#define SERIAL_SAMSUNG_PM_OPS (&s3c24xx_serial_pm_ops)
+
#else /* !CONFIG_PM_SLEEP */
-#define s3c24xx_serial_pm_ops NULL
+
+#define SERIAL_SAMSUNG_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
int s3c24xx_serial_init(struct platform_driver *drv,
struct s3c24xx_uart_info *info)
{
dbg("s3c24xx_serial_init(%p,%p)\n", drv, info);
- drv->driver.pm = &s3c24xx_serial_pm_ops;
+
+ drv->driver.pm = SERIAL_SAMSUNG_PM_OPS;
return platform_driver_register(drv);
}
static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
struct ktermios *old_termios);
- static void __uart_wait_until_sent(struct uart_port *port, int timeout);
+ static void uart_wait_until_sent(struct tty_struct *tty, int timeout);
static void uart_change_pm(struct uart_state *state, int pm_state);
/*
* closed. No cookie for you.
*/
BUG_ON(!state);
- tasklet_schedule(&state->tlet);
+ tty_wakeup(state->port.tty);
}
static void uart_stop(struct tty_struct *tty)
spin_unlock_irqrestore(&port->lock, flags);
}
- static void uart_tasklet_action(unsigned long data)
- {
- struct uart_state *state = (struct uart_state *)data;
- tty_wakeup(state->port.tty);
- }
-
static inline void
uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear)
{
clear_bit(TTY_IO_ERROR, &tty->flags);
}
+ /*
+ * This is to allow setserial on this port. People may want to set
+ * port/irq/type and then reconfigure the port properly if it failed
+ * now.
+ */
if (retval && capable(CAP_SYS_ADMIN))
retval = 0;
}
/*
- * kill off our tasklet
+ * It's possible for shutdown to be called after suspend if we get
+ * a DCD drop (hangup) at just the right time. Clear suspended bit so
+ * we don't try to resume a port that has been shutdown.
*/
- tasklet_kill(&state->tlet);
+ clear_bit(ASYNCB_SUSPENDED, &port->flags);
/*
* Free the transmit buffer page.
struct uart_port *uport;
unsigned long flags;
- BUG_ON(!tty_locked());
-
if (!state)
return;
pr_debug("uart_close(%d) called\n", uport->line);
- mutex_lock(&port->mutex);
spin_lock_irqsave(&port->lock, flags);
if (tty_hung_up_p(filp)) {
spin_unlock_irqrestore(&port->lock, flags);
- goto done;
+ return;
}
if ((tty->count == 1) && (port->count != 1)) {
}
if (port->count) {
spin_unlock_irqrestore(&port->lock, flags);
- goto done;
+ return;
}
/*
* the line discipline to only process XON/XOFF characters by
* setting tty->closing.
*/
+ set_bit(ASYNCB_CLOSING, &port->flags);
tty->closing = 1;
spin_unlock_irqrestore(&port->lock, flags);
- if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
- /*
- * hack: open-coded tty_wait_until_sent to avoid
- * recursive tty_lock
- */
- long timeout = msecs_to_jiffies(port->closing_wait);
- if (wait_event_interruptible_timeout(tty->write_wait,
- !tty_chars_in_buffer(tty), timeout) >= 0)
- __uart_wait_until_sent(uport, timeout);
- }
+ if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent_from_close(tty,
+ msecs_to_jiffies(port->closing_wait));
/*
* At this point, we stop accepting input. To do this, we
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
- __uart_wait_until_sent(uport, uport->timeout);
+ uart_wait_until_sent(tty, uport->timeout);
}
+ mutex_lock(&port->mutex);
uart_shutdown(tty, state);
uart_flush_buffer(tty);
* Wake up anyone trying to open this port.
*/
clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
+ clear_bit(ASYNCB_CLOSING, &port->flags);
spin_unlock_irqrestore(&port->lock, flags);
wake_up_interruptible(&port->open_wait);
+ wake_up_interruptible(&port->close_wait);
- done:
mutex_unlock(&port->mutex);
}
- static void __uart_wait_until_sent(struct uart_port *port, int timeout)
+ static void uart_wait_until_sent(struct tty_struct *tty, int timeout)
{
+ struct uart_state *state = tty->driver_data;
+ struct uart_port *port = state->uart_port;
unsigned long char_time, expire;
if (port->type == PORT_UNKNOWN || port->fifosize == 0)
}
}
- static void uart_wait_until_sent(struct tty_struct *tty, int timeout)
- {
- struct uart_state *state = tty->driver_data;
- struct uart_port *port = state->uart_port;
-
- tty_lock();
- __uart_wait_until_sent(port, timeout);
- tty_unlock();
- }
-
/*
* This is called with the BKL held in
* linux/drivers/char/tty_io.c:do_tty_hangup()
struct tty_port *port = &state->port;
unsigned long flags;
- BUG_ON(!tty_locked());
pr_debug("uart_hangup(%d)\n", state->uart_port->line);
mutex_lock(&port->mutex);
struct tty_port *port;
int retval, line = tty->index;
- BUG_ON(!tty_locked());
pr_debug("uart_open(%d) called\n", line);
/*
if (port->tty && port->tty->termios && termios.c_cflag == 0)
termios = *(port->tty->termios);
+ if (console_suspend_enabled)
+ uart_change_pm(state, 0);
uport->ops->set_termios(uport, &termios, NULL);
if (console_suspend_enabled)
console_start(uport->cons);
case UPIO_MEM32:
case UPIO_AU:
case UPIO_TSI:
- case UPIO_DWAPB:
- case UPIO_DWAPB32:
snprintf(address, sizeof(address),
"MMIO 0x%llx", (unsigned long long)port->mapbase);
break;
port->ops = &uart_port_ops;
port->close_delay = 500; /* .5 seconds */
port->closing_wait = 30000; /* 30 seconds */
- tasklet_init(&state->tlet, uart_tasklet_action,
- (unsigned long)state);
}
retval = tty_register_driver(normal);
*/
uport->type = PORT_UNKNOWN;
- /*
- * Kill the tasklet, and free resources.
- */
- tasklet_kill(&state->tlet);
-
state->uart_port = NULL;
mutex_unlock(&port_mutex);
case UPIO_MEM32:
case UPIO_AU:
case UPIO_TSI:
- case UPIO_DWAPB:
- case UPIO_DWAPB32:
return (port1->mapbase == port2->mapbase);
}
return 0;
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#endif
struct notifier_block freq_transition;
+
+#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
+ unsigned short saved_smr;
+ unsigned short saved_fcr;
+ unsigned char saved_brr;
+#endif
};
/* Function prototypes */
/* This routine is used for getting signals of: DTR, DCD, DSR, RI,
and CTS/RTS */
- return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR;
+ return TIOCM_DTR | TIOCM_RTS | TIOCM_CTS | TIOCM_DSR;
}
#ifdef CONFIG_SERIAL_SH_SCI_DMA
return ((freq + 16 * bps) / (32 * bps) - 1);
}
+static void sci_reset(struct uart_port *port)
+{
+ unsigned int status;
+
+ do {
+ status = sci_in(port, SCxSR);
+ } while (!(status & SCxSR_TEND(port)));
+
+ sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */
+
+ if (port->type != PORT_SCI)
+ sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
+}
+
static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
struct sci_port *s = to_sci_port(port);
- unsigned int status, baud, smr_val, max_baud;
+ unsigned int baud, smr_val, max_baud;
int t = -1;
u16 scfcr = 0;
sci_port_enable(s);
- do {
- status = sci_in(port, SCxSR);
- } while (!(status & SCxSR_TEND(port)));
-
- sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */
-
- if (port->type != PORT_SCI)
- sci_out(port, SCFCR, scfcr | SCFCR_RFRST | SCFCR_TFRST);
+ sci_reset(port);
smr_val = sci_in(port, SCSMR) & 3;
port->dev = &dev->dev;
+ pm_runtime_irq_safe(&dev->dev);
pm_runtime_enable(&dev->dev);
}
* For the muxed case there's nothing more to do.
*/
port->irq = p->irqs[SCIx_RXI_IRQ];
- port->irqflags = IRQF_DISABLED;
+ port->irqflags = 0;
port->serial_in = sci_serial_in;
port->serial_out = sci_serial_out;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
- /* TODO: disable clock */
+ sci_port_disable(sci_port);
+
return uart_set_options(port, co, baud, parity, bits, flow);
}
return 0;
}
+#define uart_console(port) ((port)->cons->index == (port)->line)
+
+static int sci_runtime_suspend(struct device *dev)
+{
+ struct sci_port *sci_port = dev_get_drvdata(dev);
+ struct uart_port *port = &sci_port->port;
+
+ if (uart_console(port)) {
+ sci_port->saved_smr = sci_in(port, SCSMR);
+ sci_port->saved_brr = sci_in(port, SCBRR);
+ sci_port->saved_fcr = sci_in(port, SCFCR);
+ }
+ return 0;
+}
+
+static int sci_runtime_resume(struct device *dev)
+{
+ struct sci_port *sci_port = dev_get_drvdata(dev);
+ struct uart_port *port = &sci_port->port;
+
+ if (uart_console(port)) {
+ sci_reset(port);
+ sci_out(port, SCSMR, sci_port->saved_smr);
+ sci_out(port, SCBRR, sci_port->saved_brr);
+ sci_out(port, SCFCR, sci_port->saved_fcr);
+ sci_out(port, SCSCR, sci_port->cfg->scscr);
+ }
+ return 0;
+}
+
#define SCI_CONSOLE (&serial_console)
#else
}
#define SCI_CONSOLE NULL
+#define sci_runtime_suspend NULL
+#define sci_runtime_resume NULL
#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
}
static const struct dev_pm_ops sci_dev_pm_ops = {
+ .runtime_suspend = sci_runtime_suspend,
+ .runtime_resume = sci_runtime_resume,
.suspend = sci_suspend,
.resume = sci_resume,
};
#include <linux/module.h>
#include <linux/serial.h>
- #include <linux/slab.h>
#include <linux/serial_core.h>
+ #include <linux/slab.h>
+ #include <linux/tty.h>
+ #include <linux/tty_flip.h>
#include <linux/io.h>
#include <linux/of_platform.h>
#include <linux/dma-mapping.h>
return qe_port->bd_virt + (addr - qe_port->bd_dma_addr);
/* something nasty happened */
- printk(KERN_ERR "%s: addr=%x\n", __func__, addr);
+ printk(KERN_ERR "%s: addr=%llx\n", __func__, (u64)addr);
BUG();
return NULL;
}
return ((struct tty_file_private *)file->private_data)->tty;
}
- /* Associate a new file with the tty structure */
- int tty_add_file(struct tty_struct *tty, struct file *file)
+ int tty_alloc_file(struct file *file)
{
struct tty_file_private *priv;
if (!priv)
return -ENOMEM;
+ file->private_data = priv;
+
+ return 0;
+ }
+
+ /* Associate a new file with the tty structure */
+ void tty_add_file(struct tty_struct *tty, struct file *file)
+ {
+ struct tty_file_private *priv = file->private_data;
+
priv->tty = tty;
priv->file = file;
- file->private_data = priv;
spin_lock(&tty_files_lock);
list_add(&priv->list, &tty->tty_files);
spin_unlock(&tty_files_lock);
+ }
- return 0;
+ /**
+ * tty_free_file - free file->private_data
+ *
+ * This shall be used only for fail path handling when tty_add_file was not
+ * called yet.
+ */
+ void tty_free_file(struct file *file)
+ {
+ struct tty_file_private *priv = file->private_data;
+
+ file->private_data = NULL;
+ kfree(priv);
}
/* Delete file from its tty */
spin_lock(&tty_files_lock);
list_del(&priv->list);
spin_unlock(&tty_files_lock);
- file->private_data = NULL;
- kfree(priv);
+ tty_free_file(file);
}
*
* Locking: tty_mutex for now
*/
-static void tty_driver_remove_tty(struct tty_driver *driver,
- struct tty_struct *tty)
+void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty)
{
if (driver->ops->remove)
driver->ops->remove(driver, tty);
nonseekable_open(inode, filp);
retry_open:
+ retval = tty_alloc_file(filp);
+ if (retval)
+ return -ENOMEM;
+
noctty = filp->f_flags & O_NOCTTY;
index = -1;
retval = 0;
if (!tty) {
tty_unlock();
mutex_unlock(&tty_mutex);
+ tty_free_file(filp);
return -ENXIO;
}
driver = tty_driver_kref_get(tty->driver);
}
tty_unlock();
mutex_unlock(&tty_mutex);
+ tty_free_file(filp);
return -ENODEV;
}
if (!driver) {
tty_unlock();
mutex_unlock(&tty_mutex);
+ tty_free_file(filp);
return -ENODEV;
}
got_driver:
if (IS_ERR(tty)) {
tty_unlock();
mutex_unlock(&tty_mutex);
+ tty_driver_kref_put(driver);
+ tty_free_file(filp);
return PTR_ERR(tty);
}
}
tty_driver_kref_put(driver);
if (IS_ERR(tty)) {
tty_unlock();
+ tty_free_file(filp);
return PTR_ERR(tty);
}
- retval = tty_add_file(tty, filp);
- if (retval) {
- tty_unlock();
- tty_release(inode, filp);
- return retval;
- }
+ tty_add_file(tty, filp);
check_tty_count(tty, "tty_open");
if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
ld = tty_ldisc_ref_wait(tty);
if (ld->ops->compat_ioctl)
retval = ld->ops->compat_ioctl(tty, file, cmd, arg);
+ else
+ retval = n_tty_compat_ioctl_helper(tty, file, cmd, arg);
tty_ldisc_deref(ld);
return retval;
extern void tty_throttle(struct tty_struct *tty);
extern void tty_unthrottle(struct tty_struct *tty);
extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
+extern void tty_driver_remove_tty(struct tty_driver *driver,
+ struct tty_struct *tty);
extern void tty_shutdown(struct tty_struct *tty);
extern void tty_free_termios(struct tty_struct *tty);
extern int is_current_pgrp_orphaned(void);
extern struct tty_struct *get_current_tty(void);
extern void tty_default_fops(struct file_operations *fops);
extern struct tty_struct *alloc_tty_struct(void);
- extern int tty_add_file(struct tty_struct *tty, struct file *file);
+ extern int tty_alloc_file(struct file *file);
+ extern void tty_add_file(struct tty_struct *tty, struct file *file);
+ extern void tty_free_file(struct file *file);
extern void free_tty_struct(struct tty_struct *tty);
extern void initialize_tty_struct(struct tty_struct *tty,
struct tty_driver *driver, int idx);
/* tty_ioctl.c */
extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg);
+ extern long n_tty_compat_ioctl_helper(struct tty_struct *tty, struct file *file,
+ unsigned int cmd, unsigned long arg);
/* serial.c */
/* functions for preparation of BKL removal */
extern void __lockfunc tty_lock(void) __acquires(tty_lock);
extern void __lockfunc tty_unlock(void) __releases(tty_lock);
- extern struct task_struct *__big_tty_mutex_owner;
- #define tty_locked() (current == __big_tty_mutex_owner)
+
+ /*
+ * this shall be called only from where BTM is held (like close)
+ *
+ * We need this to ensure nobody waits for us to finish while we are waiting.
+ * Without this we were encountering system stalls.
+ *
+ * This should be indeed removed with BTM removal later.
+ *
+ * Locking: BTM required. Nobody is allowed to hold port->mutex.
+ */
+ static inline void tty_wait_until_sent_from_close(struct tty_struct *tty,
+ long timeout)
+ {
+ tty_unlock(); /* tty->ops->close holds the BTM, drop it while waiting */
+ tty_wait_until_sent(tty, timeout);
+ tty_lock();
+ }
/*
* wait_event_interruptible_tty -- wait for a condition with the tty lock held
git.openpandora.org / pandora-kernel.git / commitdiff