Fabio Estevam [Fri, 7 Nov 2014 02:23:14 +0000 (00:23 -0200)]
serial: fsl_lpuart: Remove unneeded registration message
There is no real value in displaying "serial: Freescale lpuart driver" in every
boot.
The uart_register_driver() can fail and even so the "serial: Freescale lpuart
driver" will be displayed, which is not really helpful.
This is particularly annoying when booting multi_v7_defconfig kernel on a SoC
that is not a Vybrid/Layerscape and even though this message gets displayed.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabio Estevam [Fri, 7 Nov 2014 02:23:13 +0000 (00:23 -0200)]
serial: fsl_lpuart: Remove unneeded check for 'res'
'res' will be automatically checked inside devm_ioremap_resource(), so there is
no need to explicitly perform a NULL check.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Konrad Zapalowicz [Thu, 6 Nov 2014 23:05:35 +0000 (00:05 +0100)]
drivers: serial: jsm: Remove FSF address from the file documentation/header
This commit removes the address of Free Software Foundation from each
of the mentioned file in order to suppress the checkpatch warning.
Signed-off-by: Konrad Zapalowicz <bergo.torino@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Konrad Zapalowicz [Thu, 6 Nov 2014 23:05:33 +0000 (00:05 +0100)]
drivers: serial: jsm: Enable support for Digi Classic adapters
This commit enables support for the Digi Classic adapters line in the
jsm driver. This means changes in:
- device probing code
- device cleanup code
- driver description (Kconfig)
The init/cleanup code is based on the staging/dgnc driver.
Signed-off-by: Konrad Zapalowicz <bergo.torino@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Konrad Zapalowicz [Thu, 6 Nov 2014 23:05:32 +0000 (00:05 +0100)]
drivers: serial: jsm: Add the Classic board implementation
This commit adds the Digi Classic board implementation to the
staging/jsm driver.
The code here is taken from the staging/dgnc driver and modified to
match the serial/jsm state. This work is mostly based on the changes
that has been done to the code handling the Digi Neo cards with the
inspiration coming from the diff between staging/dgnc and serial/jsm
as well as the LKML history for the jsm_neo.c
The code compiles now and has no sparse and checkpatch errors or
warnings.
Signed-off-by: Konrad Zapalowicz <bergo.torino@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Frans Klaver [Thu, 6 Nov 2014 20:10:17 +0000 (21:10 +0100)]
serial: 8250_core: actually limit char reads to max_count
In serial8250_rx_chars(), max_count is set to 256. Due to the
post-decrement operator used in the while() condition, the maximum
number of iterations actually 257. This is not a problem, but it is
mildly surprising if you're debugging. Use pre-decrement instead.
Signed-off-by: Frans Klaver <frans.klaver@xsens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jiri Slaby [Thu, 6 Nov 2014 15:56:33 +0000 (16:56 +0100)]
tty: warn on deprecated serial flags
When somebody calls TIOCSSERIAL ioctl with serial flags to set one of
* ASYNC_SESSION_LOCKOUT
* ASYNC_PGRP_LOCKOUT
* ASYNC_CALLOUT_NOHUP
* ASYNC_AUTOPROBE
nothing happens. We actually ignore the flags for over a decade at
least (I checked 2.6.0).
So start yelling at users who use those flags, that they shouldn't.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Konrad Zapalowicz [Mon, 3 Nov 2014 18:52:37 +0000 (19:52 +0100)]
drivers: serial: jsm: Add Classic board UART structure
This commit adds the UART structure for the Digi Classic cards. This
code comes from the staging/dgnc driver.
Signed-off-by: Konrad Zapalowicz <bergo.torino@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sudip Mukherjee [Thu, 6 Nov 2014 13:30:42 +0000 (19:00 +0530)]
serial: MIPS: lantiq: use devm_iounmap instead of iounmap
port->membase was allocated using devm_ioremap_nocache, so ideally
we should unmap it using devm_iounmap. but it was using iounmap.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Shevchenko [Thu, 6 Nov 2014 11:28:17 +0000 (13:28 +0200)]
serial: 8250_dma: no need to set tx_err twice
In the serial8250_tx_dma() the tx_err flag is set in case of error. Thus, there
is no need to repeat this in __dma_tx_complete().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Shevchenko [Thu, 6 Nov 2014 11:28:16 +0000 (13:28 +0200)]
serial: 8250_dma: call serial8250_tx_dma unconditionally
Since we have the same check inside the function we may drop it away in
__dma_tx_complete().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:23:00 +0000 (09:23 +0100)]
tty/serial_core: Introduce lock mechanism for RS485
Introduce an homogeneous lock system between setting and using the rs485
data of the uart_port.
This patch should not be split into multiple ones in order to avoid
leaving the tree in an unstable state.
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Suggested-by: Alan Cox <alan@linux.intel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:59 +0000 (09:22 +0100)]
serial_core: Remove call to driver-specific TIO[GS]RS485]
Once there is no more handlers for TIOC[GS]RS485 there is no need to
call the driver specific ioctl when the generic implementation is
missing.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:58 +0000 (09:22 +0100)]
drivers/max310: Use the rs485 functions on serial_core
In order to unify all the rs485 ioctl handling
Use the implementation of TIOC[GS]RS485 ioctl handling on serial_core.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 21:46:14 +0000 (22:46 +0100)]
serial/omap: Use the rs485 functions on serial_core
In order to unify all the rs485 ioctl handling
Use the implementation of TIOC[GS]RS485 ioctl handling on serial_core.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:56 +0000 (09:22 +0100)]
serial/atmel: Use the rs485 functions on serial_core
In order to unify all the rs485 ioctl handling.
Use the implementation of TIOC[GS]RS485 ioctl handling on serial_core.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:55 +0000 (09:22 +0100)]
serial/mcf: Use the rs485 functions on serial_core
In order to unify all the rs485 ioctl handling.
Use the implementation of TIOC[GS]RS485 ioctl handling on serial_core.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:54 +0000 (09:22 +0100)]
serial/sc16is7xx: Use the rs485 functions on serial_core
In order to unify all the rs485 ioctl handling.
Use the implementation of TIOC[GS]RS485 ioctl handling on serial_core.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:53 +0000 (09:22 +0100)]
serial/8250: Remove obsolete handling of rs485 ioctls
There is no more users for this functions. All the 8250 drivers are
using the rs485 handler on serial_core instead.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:52 +0000 (09:22 +0100)]
8250/fintek: Use rs485 handler from serial_core
In order to remove the handler for rs485 ioctls on serial_8250, all the
drivers must use the implementation on serial_core.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 08:22:51 +0000 (09:22 +0100)]
serial/8250: Copy RS485 fields to serial_core
Initialize recently added rs485 fields on serial_core
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Thu, 6 Nov 2014 21:46:13 +0000 (22:46 +0100)]
serial_core: Handle TIOC[GS]RS485 ioctls.
The following drivers: 8250_core, atmel_serial, max310x, mcf, omap-serial
and sci16is7xx implement code to handle RS485 ioctls.
In order to avoid code duplication, we implement a simple ioctl handler
on the serial_core layer.
This handler can be used by all the other drivers instead of duplicating
code.
Until this is the only RS485 ioctl handler, it will try first the
rs485_config callback and if it is not present it will call the driver
specific ioctl.
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sudip Mukherjee [Thu, 16 Oct 2014 08:46:22 +0000 (14:16 +0530)]
serial: 8250: sparse warning of incorrect type
fixed a sparse warning in 8250_core.c :
incorrect type in assignment (different address spaces)
the warning was because an unsigned char pointer was being assigned to
a pointer of unsigned char __iomem type .
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sergej Pupykin [Thu, 6 Nov 2014 11:36:31 +0000 (14:36 +0300)]
parport: Add support for the WCH382 2S/1P multi-IO card
WCH382 is a PCI-E card with 1 LPT and 2 DB9 COM ports detected as
Serial controller: Device 1c00:3250 (rev 10) (prog-if 05 [16850])
Signed-off-by: Sergej Pupykin <ml@sergej.pp.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 18:11:45 +0000 (13:11 -0500)]
serial: Test/disable MSIs if switching from N_PPS
Switching to the N_PPS line discipline may require enabling
modem status interrupts; conversely switching from N_PPS may
require disabling modem status interrupts.
Affected drivers:
8250
amba-pl010
atmel
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 18:11:44 +0000 (13:11 -0500)]
serial: Take uart port lock for direct *_enable_ms()
Three UART drivers (8250, atmel & amba-pl010) directly call their
enable_ms() method; the uart port lock must be acquired before
any h/w programming.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 18:11:43 +0000 (13:11 -0500)]
serial: core: Pass termios to set_ldisc() notifications
UART drivers which enable modem status interrupts when switching
to N_PPS line discipline need to determine if modem status
interrupts should be disabled when switching from N_PPS.
Specifically, the set_ldisc() notification needs to evaluate
UART_ENABLE_MS() which requires termios->c_cflag.
Convert in-tree UART drivers to new interface.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 18:11:42 +0000 (13:11 -0500)]
serial: core: Claim port mutex for set_ldisc()
Three UART drivers (8250, atmel & amba-pl010) enable modem status
interrupts if the line discipline is changed to N_PPS. However,
the uart port flags may only be safely modified while holding the
port mutex.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 18:11:41 +0000 (13:11 -0500)]
tty: Allow safe access to termios for set_ldisc() handlers
Allow a tty driver to safely access termios settings while handling
the set_ldisc() notification. UART drivers use the set_ldisc()
notification to check if the N_PPS line discipline is being enabled;
if so, modem status interrupts may also need to be enabled. Conversely,
modem status interrupts may need to be disabled if switching away
from the N_PPS line discipline.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:40:05 +0000 (12:40 -0500)]
tty: Flush tty buffers after hardware shutdown
The line discipline buffer and the tty buffers must be flushed again
after hardware shutdown; otherwise, a brief window exists between the
ldisc flush in tty_port_close_start() and the subsequent
tty_port_shutdown(), during which more data could be received into the
tty buffers. A racing open might then be able to receive data from the
previous session.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:40:04 +0000 (12:40 -0500)]
tty: Convert tty->closing to int
tty->closing is a bitfield member; prevent corruption from non-atomic
update by assigning a unique memory location.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:40:03 +0000 (12:40 -0500)]
tty: Move tty hung up check from port->lock critical section
The port->lock does not protect the filp->f_op field; move
the tty_hung_up_p() test outside the port->lock critical section
in tty_port_close_start().
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lars-Peter Clausen [Wed, 5 Nov 2014 12:35:16 +0000 (13:35 +0100)]
tty: xuartps: Add support for setting modem control signals
Add support for setting the state of the DTR and RTS signals.
Acked-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Julien CHAUVEAU [Tue, 4 Nov 2014 10:45:55 +0000 (11:45 +0100)]
serial: 8250_dw: get index of serial line from DT aliases
Get index of serial line from device tree using function of_alias_get_id().
If no alias is found, the 8250 core takes care of incrementing the line number.
Signed-off-by: Julien CHAUVEAU <julien.chauveau@neo-technologies.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lucas Stach [Mon, 3 Nov 2014 22:16:54 +0000 (23:16 +0100)]
serial: of-serial: fetch line number from DT
The general agreed way to specify a fixed line number
for a serial console is to provide a "serial" alias
in the devicetree. Start parsing this property in
of_serial.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Aaron Sierra [Fri, 31 Oct 2014 00:49:52 +0000 (19:49 -0500)]
serial: 8250_pci: Check mapping in pci_ni8430_init
Check the return value of ioremap_nocache to make sure we got a
valid mapping.
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Aaron Sierra [Fri, 31 Oct 2014 00:49:45 +0000 (19:49 -0500)]
serial: 8250_pci: Handle devices mapped above 4 GiB
Several init/setup functions passed the PCI BAR resource start address
to ioremap_nocache() via an unsigned long. This caused address truncation
for a 32-bit device mapped above 4 GiB (i.e. the CPU interacts with the
device via a translated address), which resulted in a kernel panic.
This patch replaces all of the instances of intermediate variable use
with pci_ioremap_bar() to ensure the full resource_size_t start address
is used and that ioremap_nocache() is still called.
The kernel panic (Exar XR17V358 PCIe device on a Freescale P2020 SBC):
Machine check in kernel mode.
Caused by (from MCSR=10008): Bus - Read Data Bus Error
Oops: Machine check, sig: 7 [#1]
SMP NR_CPUS=2 X-ES P2020
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.14.15-xes_r2-00002-g560e401 #978
task:
bf850000 ti:
bffee000 task.ti:
bf84c000
NIP:
80318e10 LR:
80319ecc CTR:
80318dfc
REGS:
bffeff10 TRAP: 0204 Not tainted (3.14.15-xes_r2-00002-g560e401)
MSR:
00021000 <CE,ME> CR:
20adbe42 XER:
00000000
DEAR:
c1058001 ESR:
00000000
GPR00:
00000000 bf84db30 bf850000 80cb4af8 00000001 00000000 80000007 80000000
GPR08:
bf837c9c c1058001 00000001 00000000 80000007 00000000 80002a10 00000000
GPR16:
00000000 00000000 00000000 00000000 00000000 00000000 80cb0000 80c72dc4
GPR24:
80cb4900 fffffffe 00029000 00000001 bf8c11e8 ffffffea 80c72ce4 80cb4af8
NIP [
80318e10] mem_serial_in+0x14/0x28
LR [
80319ecc] serial8250_config_port+0x160/0xe38
Call Trace:
[
bf84db30] [
80319d94] serial8250_config_port+0x28/0xe38 (unreliable)
[
bf84db60] [
80315e3c] uart_add_one_port+0x148/0x3a4
[
bf84dbf0] [
8031bf40] serial8250_register_8250_port+0x2dc/0x3c8
[
bf84dc20] [
8032111c] pciserial_init_ports+0xd4/0x1c0
[
bf84dd50] [
803212f8] pciserial_init_one+0xf0/0x224
[
bf84dd90] [
802d8ff4] local_pci_probe+0x34/0x8c
[
bf84dda0] [
802d92c8] pci_device_probe+0x84/0xa0
[
bf84ddc0] [
80329ee0] driver_probe_device+0xac/0x26c
[
bf84dde0] [
8032a15c] __driver_attach+0xbc/0xc0
[
bf84de00] [
80328388] bus_for_each_dev+0x90/0xcc
[
bf84de30] [
80329cd0] driver_attach+0x24/0x34
[
bf84de40] [
80328e28] bus_add_driver+0x104/0x1fc
[
bf84de60] [
8032a8c8] driver_register+0x70/0x138
[
bf84de70] [
802d93c0] __pci_register_driver+0x48/0x58
[
bf84de80] [
8077e0e4] serial_pci_driver_init+0x24/0x34
[
bf84de90] [
80002228] do_one_initcall+0x34/0x1b0
[
bf84df00] [
80764294] kernel_init_freeable+0x138/0x1e8
[
bf84df30] [
80002a24] kernel_init+0x14/0x108
[
bf84df40] [
8000ef94] ret_from_kernel_thread+0x5c/0x64
Instruction dump:
800800c4 7d290214 39290001 7c0004ac 7ca049ae 7c0004ac 4e800020 88030035
81230008 7c840030 7d292214 7c0004ac <
88690000>
0c030000 4c00012c 5463063e
---[ end trace
e3c16443b5d573c6 ]---
Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jingchang Lu [Fri, 24 Oct 2014 09:20:49 +0000 (17:20 +0800)]
serial: fsl-lpuart: add lpuart32 power management support
This adds 32-bit register lpuart32 power management support,
this also updates the 8-bit register lpuart resume function.
Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Maxime Ripard [Wed, 22 Oct 2014 15:43:16 +0000 (17:43 +0200)]
serial: at91: Use dmaengine_slave_config API
We are removing the dmaengine_device_control API, that shouldn't even have been
exposed in the first place. Change the callers to use the proper API.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eddie Huang [Wed, 22 Oct 2014 13:12:07 +0000 (21:12 +0800)]
tty: serial: Fix mediatek UART driver setting baudrate issue
In mtk8250_set_termios function, calculating quot value can not be zero,
otherwise, using DIV_ROUND_CLOSEST(port->uartclk, quot * baud) will fail due to
divisor is zero.
Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:23:06 +0000 (15:23 -0700)]
MAINTAINERS: Add entry for rp2 (Rocketport Express/Infinity) driver
I wrote this driver and use it daily on several machines for work, so
why not.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:23:03 +0000 (15:23 -0700)]
tty: serial: bcm63xx: Eliminate unnecessary request/release functions
We don't really need to perform the ioremap "on demand" so it's simpler
just to do it from the probe function. This also lets us eliminate the
UART_REG_SIZE constant and rely on the resource information passed in
from the DT or platform code.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:23:02 +0000 (15:23 -0700)]
tty: serial: bcm63xx: Enable DT earlycon support
This enables early console output if there is a chosen/stdout-path
property referencing a UART node with the "brcm,bcm6345-uart" compatible
string. The bootloader sets up the pinmux and baud/parity/etc.
Tested on bcm3384 (MIPS, DT).
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:23:01 +0000 (15:23 -0700)]
Documentation: DT: Add entries for bcm63xx UART
This squashes a checkpatch warning on my new bcm3384 dts submission.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:23:00 +0000 (15:23 -0700)]
tty: serial: bcm63xx: Fix typo in MODULE_DESCRIPTION
Remove the extra '<' character.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:22:59 +0000 (15:22 -0700)]
tty: serial: bcm63xx: Update the Kconfig help text
Remove incorrect "bcm963xx_uart" module name; add a list of known users;
tweak grammar/indentation/capitalization.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:22:58 +0000 (15:22 -0700)]
tty: serial: bcm63xx: Add support for unnamed clock outputs from DT
The original non-DT bcm63xx clk code ignores the struct device argument
and looks up a global clock name. DT platforms, by contrast, often just
use a phandle to reference a clock node with no "clock-output-names"
property. Modify the UART driver to support both schemes.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kevin Cernekee [Tue, 21 Oct 2014 22:22:57 +0000 (15:22 -0700)]
tty: serial: bcm63xx: Allow bcm63xx_uart to be built on other platforms
This device was originally supported on bcm63xx only, but it shows up on
a wide variety of MIPS and ARM chipsets spanning multiple product lines.
Now that the driver has eliminated dependencies on bcm63xx-specific
header files, we can build it on any non-bcm63xx kernel.
Compile-tested on x86, both statically and as a module. Tested for
functionality on bcm3384 (a new MIPS platform under active development).
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Thompson [Tue, 28 Oct 2014 08:28:08 +0000 (09:28 +0100)]
serial: imx: add imx_poll_init()
For the console poll usage, .poll_init() will perform deeper hardware
initialization to ensure the serial port is always active.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Huang Shijie <b32955@freescale.com>
Cc: linux-serial@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Thompson [Tue, 28 Oct 2014 08:28:07 +0000 (09:28 +0100)]
serial: imx: clean up imx_poll_put_char()
imx_put_poll_char() has been simplified to remove the code to disable
interrupts. The present code can corrupt register state when re-entered
from FIQ handler.
Switch to _relaxed() MMIO functions (which are safe for polled I/O and
needed to avoid taking spin locks).
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Huang Shijie <b32955@freescale.com>
Cc: linux-serial@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephen Boyd [Thu, 23 Oct 2014 00:33:01 +0000 (17:33 -0700)]
tty: serial: msm_serial: Use DT aliases
We rely on probe order of this driver to determine the line number for
the uart port. This makes it impossible to know the line number
when these devices are populated via DT. Use the DT alias
mechanism to assign the line based on the aliases node.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephen Boyd [Thu, 30 Oct 2014 01:47:01 +0000 (18:47 -0700)]
tty: serial: msm: Reset uartdm after baud rate change
We need to issue a reset if we ever change the value of the IPR
register on DM hardware. If we don't reset the hardware the RX
stale interrupt never triggers and the only way to trigger an RX
handling event is by filling up the fifo. This causes things like
getty to not work so well considering it might change the baud
rate a few times. Fix this by moving the reset on startup and any
reprogramming required after the reset to be after we change the
baud rate.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephen Boyd [Wed, 29 Oct 2014 18:14:38 +0000 (11:14 -0700)]
tty: serial: msm: Support sysrq on uartDM devices
To properly support sysrq on uartDM hardware we need to properly
handle break characters. With the DM hardware the fifo can pack 4
characters at a time, where a break is indicated by an all zero
byte. Unfortunately, we can't differentiate between an all zero
byte for a break and an all zero byte of data, so try and do as
best we can. First unmask the RX break start interrupt and record
the interrupt when it arrives. Then while processing the fifo,
detect the break by searching for an all zero character as long
as we recently received an RX break start interrupt. This should
make sysrq work fairly well.
Cc: Frank Rowand <frank.rowand@sonymobile.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephen Boyd [Wed, 29 Oct 2014 18:14:37 +0000 (11:14 -0700)]
tty: serial: msm: Fix sysrq spinlock recursion on non-DM
The handle_rx() path calls uart_handle_sysrq_char() with the port
lock held. This causes a spinlock recursion. Release and
reacquire the lock here to avoid this.
BUG: spinlock recursion on CPU#0, swapper/0
lock: msm_uart_ports+0x1e0/0x2d0, .magic:
dead4ead, .owner: swapper/0, .owner_cpu: 0
CPU: 0 PID: 0 Comm: swapper Not tainted 3.17.0-rc7-00012-gb38ee8265941 #69
[<
c0013964>] (unwind_backtrace) from [<
c0011f74>] (show_stack+0x10/0x14)
[<
c0011f74>] (show_stack) from [<
c004ed1c>] (do_raw_spin_lock+0x11c/0x13c)
[<
c004ed1c>] (do_raw_spin_lock) from [<
c02d44c0>] (msm_console_write+0x78/0x188)
[<
c02d44c0>] (msm_console_write) from [<
c0052880>] (call_console_drivers.constprop.22+0xb4/0x144)
[<
c0052880>] (call_console_drivers.constprop.22) from [<
c0053570>] (console_unlock+0x27c/0x4ac)
[<
c0053570>] (console_unlock) from [<
c0053bb4>] (vprintk_emit+0x1f4/0x5a8)
[<
c0053bb4>] (vprintk_emit) from [<
c04ad0ac>] (printk+0x30/0x40)
[<
c04ad0ac>] (printk) from [<
c02c2990>] (__handle_sysrq+0x58/0x1b8)
[<
c02c2990>] (__handle_sysrq) from [<
c02d41b0>] (msm_irq+0x694/0x6f8)
[<
c02d41b0>] (msm_irq) from [<
c0055740>] (handle_irq_event_percpu+0x58/0x270)
[<
c0055740>] (handle_irq_event_percpu) from [<
c0055994>] (handle_irq_event+0x3c/0x5c)
[<
c0055994>] (handle_irq_event) from [<
c0057e84>] (handle_level_irq+0x9c/0x138)
[<
c0057e84>] (handle_level_irq) from [<
c005509c>] (generic_handle_irq+0x24/0x38)
[<
c005509c>] (generic_handle_irq) from [<
c000f730>] (handle_IRQ+0x44/0xb0)
[<
c000f730>] (handle_IRQ) from [<
c0008518>] (msm_vic_handle_irq+0x44/0x64)
[<
c0008518>] (msm_vic_handle_irq) from [<
c04b5ac4>] (__irq_svc+0x44/0x7c)
Exception stack(0xc0719f68 to 0xc0719fb0)
9f60:
00000001 00000001 00000000 c0722938 c0718000 c0769acc
9f80:
00000000 c0720098 c0769305 4117b362 c0769acc 00000000 01000000 c0719fb0
9fa0:
c004cab0 c000f880 20000013 ffffffff
[<
c04b5ac4>] (__irq_svc) from [<
c000f880>] (arch_cpu_idle+0x20/0x30)
[<
c000f880>] (arch_cpu_idle) from [<
c004691c>] (cpu_startup_entry+0xf4/0x23c)
[<
c004691c>] (cpu_startup_entry) from [<
c06d8b70>] (start_kernel+0x32c/0x394)
Cc: Frank Rowand <frank.rowand@sonymobile.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Janusz Uzycki [Fri, 10 Oct 2014 16:53:27 +0000 (18:53 +0200)]
serial: mxs-auart: enable PPS support
Enables PPS support in mxs-auart serial driver to make PPS API working.
Signed-off-by: Janusz Uzycki <j.uzycki@elproma.com.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Janusz Uzycki [Fri, 10 Oct 2014 16:53:26 +0000 (18:53 +0200)]
serial: mxs-auart: add interrupts for modem control lines
Handle CTS/DSR/RI/DCD GPIO interrupts in mxs-auart.
Signed-off-by: Janusz Uzycki <j.uzycki@elproma.com.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Janusz Uzycki [Fri, 10 Oct 2014 16:53:25 +0000 (18:53 +0200)]
serial: mxs-auart: use mctrl_gpio helpers for handling modem signals
Dedicated CTS and RTS pins are unusable together with a lot of other
peripherals because they share the same line. Pinctrl is limited.
Moreover, the AUART controller doesn't handle DTR/DSR/DCD/RI signals,
so we have to control them via GPIO.
This patch permits to use GPIOs to control the CTS/RTS/DTR/DSR/DCD/RI
signals.
Signed-off-by: Janusz Uzycki <j.uzycki@elproma.com.pl>
Reviewed-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Janusz Uzycki [Fri, 10 Oct 2014 16:53:24 +0000 (18:53 +0200)]
serial: mxs-auart: clean get_mctrl and set_mctrl
Russell King:
The only thing which the .get_mctrl method is supposed to do is
to return the state of the /input/ lines, which are CTS, DCD, DSR, RI.
The output line state is stored in port->mctrl, and is added to
the returned value by serial_core when it's required.
RTS output state should not be returned from the .get_mctrl method.
This patch removes ctrl variable from mxs_auart_port
and removes useless reading back RTS line.
The ctrl variable in mxs_auart_port duplicated mctrl,
member of uart_port structure in serial_core.h.
The removed code from mxs_auart_set_mctrl() and mxs_auart_get_mctrl
duplicated uart_update_mctrl() and uart_tiocmget()
in serial_core.c.
Signed-off-by: Janusz Uzycki <j.uzycki@elproma.com.pl>
Reviewed-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cyrille Pitchen [Mon, 20 Oct 2014 17:12:20 +0000 (19:12 +0200)]
tty/serial: at91: fix rx ring buffer management
This patch swaps the use "tail" and "head" to fit the semantic of the linux
circular buffer documentation:
- head: the point at which the producer (the DMA controller) inserts items.
- tail: the point at which the consumer (the serial framework) finds the next
item.
Besides the former code of the rx ring buffer didn't manage the case where
head < tail, which might lead to loss of data. To fix this bug the data are now
sent from the DMA buffer to the serial framework in two steps:
1 - First, we test if head < tail. If so, we copy the data from tail to the end
of the DMA buffer then reset tail to zero.
2 - Finally, we copy data from tail to head then set tail to head.
In addition, since tty_insert_flip_string() may now be called twice,
atmel_flip_buffer_rx_dma() becomes less efficient than moving the calls
dma_sync_sg_for_cpu(), dma_sync_sg_for_device(), tty_insert_flip_string() and
tty_flip_buffer_push() directly into atmel_rx_from_dma().
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John Crispin [Thu, 16 Oct 2014 20:43:27 +0000 (22:43 +0200)]
serial: of_serial: add "ralink,rt2880-uart" to the binding documentation
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John Crispin [Thu, 16 Oct 2014 19:48:22 +0000 (21:48 +0200)]
serial: ralink: adds Mediatek MT7620 serial
Add the config symbol for Mediatek MT7620 SoC to the SERIAL_8250_RT288X
dependencies.
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John Crispin [Thu, 16 Oct 2014 19:48:21 +0000 (21:48 +0200)]
serial: of: add a PORT_RT2880 definition
The Ralink RT2880 SoC and its successors have an internal 8250 core. This core
needs the same quirks applied as the AMD AU1xxx uart. In addition to these
quirks, the ports memory region is only 0x100 unlike the AU1xxx which has a
size of 0x1000.
Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nishanth Menon [Wed, 22 Oct 2014 12:46:50 +0000 (07:46 -0500)]
tty: serial: omap: Increase max consoles and add check to prevent crash
Increase the maximum number of consoles possible to 10 since DRA7 now
has the maximum number of consoles possible. without doing this, for
example, enabling DRA7 UART10 results in internal data structures and
console cannot match up and we endup with a crash as follows:
[ 1.903503] omap_uart
48424000.serial: [UART-1]: failure [serial_omap_probe]: -22
[ 1.911437] omap_uart: probe of
48424000.serial failed with error -22
[ 1.920379] Unable to handle kernel NULL pointer dereference at virtual address
00000004
[ 1.928894] pgd =
c0004000
[ 1.931732] [
00000004] *pgd=
00000000
[ 1.935485] Internal error: Oops: 5 [#1] SMP ARM
[ 1.940338] Modules linked in:
[ 1.943542] CPU: 1 PID: 12 Comm: kworker/1:0 Tainted: G W 3.18.0-rc1-00001-g8821bc4-dirty #6
[ 1.953521] task:
ed8a2d00 ti:
ed8a4000 task.ti:
ed8a4000
[ 1.959197] PC is at process_one_work+0x38/0x4a4
[ 1.964050] LR is at 0x0
[ 1.966705] pc : [<
c00548e0>] lr : [<
00000000>] psr:
40000093
[ 1.966705] sp :
ed8a5ea8 ip :
ed8a5ec8 fp :
eeb9abc0
[ 1.978759] r10:
ed8a4000 r9 :
00000008 r8 :
ed842458
[ 1.984252] r7 :
00000000 r6 :
eeb9abc0 r5 :
ed842440 r4 :
edbf26a8
[ 1.991119] r3 :
00000000 r2 :
00000000 r1 :
00000000 r0 :
00000000
[ 1.997985] Flags: nZcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 2.005767] Control:
10c5387d Table:
8000406a DAC:
00000015
[ 2.011810] Process kworker/1:0 (pid: 12, stack limit = 0xed8a4248)
[ 2.018371] Stack: (0xed8a5ea8 to 0xed8a6000)
[ 2.022949] 5ea0:
00000001 00000000 60000093 c008346c 00000001 ed8a5ec8
[ 2.031555] 5ec0:
c0054de4 eeb9abc0 ed8a4000 ed842458 00000008 ed8a4000 eeb9abc0 ed842440
[ 2.040161] 5ee0:
eeb9abc0 eeb9abf0 ed8a4000 ed842458 00000008 ed8a4000 eeb9abc0 c0054ec4
[ 2.048767] 5f00:
ed8a4000 eeb9ac4c a0000053 00000000 ed845bc0 ed842440 c0054d80 00000000
[ 2.057342] 5f20:
00000000 00000000 00000000 c005999c 00000001 00000000 c05eaa64 ed842440
[ 2.065948] 5f40:
00000000 00000000 dead4ead ffffffff ffffffff c097c680 00000000 00000000
[ 2.074554] 5f60:
c078acd4 ed8a5f64 ed8a5f64 00000000 00000000 dead4ead ffffffff ffffffff
[ 2.083160] 5f80:
c097c680 00000000 00000000 c078acd4 ed8a5f90 ed8a5f90 600000d3 ed845bc0
[ 2.091766] 5fa0:
c00598d4 00000000 00000000 c000e668 00000000 00000000 00000000 00000000
[ 2.100341] 5fc0:
00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 2.108947] 5fe0:
00000000 00000000 00000000 00000000 00000013 00000000 90005148 11010482
[ 2.117553] [<
c00548e0>] (process_one_work) from [<
c0054ec4>] (worker_thread+0x144/0x498)
[ 2.126159] [<
c0054ec4>] (worker_thread) from [<
c005999c>] (kthread+0xc8/0xe4)
[ 2.133758] [<
c005999c>] (kthread) from [<
c000e668>] (ret_from_fork+0x14/0x2c)
[ 2.141357] Code:
e1a04001 e1a05000 e893000f e31e0004 (
e5978004)
[ 2.147766] ---[ end trace
5798e2803311b69f ]---
<snip>
The final solution is to transition off to use 8250 driver and no
dependency on console structures and move away from omap-serial
driver, hence no major cleanups are done for this driver, so add a
simple check to prevent future crashes in a similar manner in case of
platform with additional ports.
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Thu, 6 Nov 2014 14:06:12 +0000 (09:06 -0500)]
serial: pl011: Fix build breakage with !CONFIG_DMA_ENGINE
Commit
479e9b94fdce7bc4 ("serial: Refactor uart_flush_buffer() from
uart_close") refactored the uart_flush_buffer() in uart_close() into
those drivers that define a flush_buffer() method. However, in the
amba-pl011 driver configured without CONFIG_DMA_ENGINE, flush_buffer()
is a NULL method, so the direct call fails to compile.
Check and call the flush_buffer() method through the ops table instead.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peng Fan [Sun, 26 Oct 2014 12:08:02 +0000 (20:08 +0800)]
tty:vt remove obsolete struct initializer
This patch fixes sparse warning:
"obsolete struct initializer, use C99 syntax"
Signed-off-by: Peng Fan <van.freenix@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:32 +0000 (12:26 -0500)]
serial: 8250_em: Remove out-of-memory message
devm_kzalloc() already warns if allocation fails; remove duplicate
message.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:31 +0000 (12:26 -0500)]
vt: Remove vt_get_kmsg_redirect() from uapi header
vt_get_kmsg_redirect() only has meaning to the console driver as
an alias for calling vt_kmsg_redirect(). Move the macro definition
to the only source file which uses it; remove from uapi/linux/vt.h
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:30 +0000 (12:26 -0500)]
tty: Document defunct ASYNC_SPLIT_TERMIOS flag in uapi header
The last vestige of ASYNC_SPLIT_TERMIOS was removed by commit
'cris: Remove obsolete ASYNC_SPLIT_TERMIOS behavior'. Mark the flag
as defunct in the uapi header.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:29 +0000 (12:26 -0500)]
cris: Remove obsolete ASYNC_SPLIT_TERMIOS behavior
ASYNC_SPLIT_TERMIOS behavior is a remnant of the long-dead /dev/cuaXX
callout device. Split termios handling was removed tree-wide in v2.5.71 by:
commit
99a21edebbfd8c29e39ee7fcc8a1ffa423657290
Author: Alexander Viro <viro@www.linux.org.uk>
Date: Wed Jun 11 07:41:28 2003 -0700
[PATCH] tty_driver refcounting
killed the last remnants of callout stuff - we don't need to mess with
storing termios privately anymore.
which pre-dated the re-introduction into the cris serial driver
in v2.6.7 by:
commit
311a5ffeda8ccb3f1f3840069f37234e043092d4
Author: Andrew Morton <akpm@osdl.org>
Date: Mon May 31 18:52:29 2004 -0700
[PATCH] CRIS architecture update
From: "Mikael Starvik" <mikael.starvik@axis.com>
- Lots of fixes from 2.4.
- Updated for 2.6.6.
- Added IDE driver
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:28 +0000 (12:26 -0500)]
serial: hp300: Remove obsolete comments
setup_serial_console() is obsolete and has been superseded by
early_serial_setup() which is called at the end of the function.
The IA64 arch does not call this function; only the m68k arch setup
calls this function.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:27 +0000 (12:26 -0500)]
tty: Remove defunct serial_console_init() declaration
serial_console_init() is not defined by the tty core; remove
declaration.
Note that the powerpc arch boot code contains a serial_console_init()
declaration in arch/powerpc/boot/ops.h which is restricted to
the powerpc arch boot.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:26 +0000 (12:26 -0500)]
tty: Remove defunct pcxe_open() declaration
pcxe_open() has no definition in mainline; remove declaration.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:25 +0000 (12:26 -0500)]
tty: Call methods in modern style
The use of older function ptr calling style, (*fn)(), makes static
analysis more error-prone; replace with modern fn() style.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Hurley [Wed, 5 Nov 2014 17:26:24 +0000 (12:26 -0500)]
tty: Replace open-coded test with tty_hung_up_p()
tty_hung_up_p() is equivalent to the open-coded test in tty_open().
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joe Perches [Mon, 27 Oct 2014 05:25:05 +0000 (22:25 -0700)]
tty: ipwireless: Fix probable mask then right shift defects
Precedence of & and >> is not the same and is not left to right.
shift has higher precedence and should be done after the mask.
Add parentheses around the masks.
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: David Sterba <dsterba@suse.cz>
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabio Estevam [Mon, 27 Oct 2014 16:49:40 +0000 (14:49 -0200)]
serial: imx: Remove unneeded registration message
There is no real value in displaying "Serial: IMX driver" in every boot.
The uart_register_driver() can fail and even so the "Serial: IMX driver" will
be displayed, which is not really helpful.
This is particularly annoying when booting multi_v7_defconfig kernel on a SoC
that is not a i.MX and even though this message gets displayed.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabio Estevam [Mon, 27 Oct 2014 16:49:39 +0000 (14:49 -0200)]
serial: imx: Remove unneeded OOM error message
When kzalloc() fails the core MM will already complain about it, so there is
no need to have the error message locally.
Remove the unneeded error message.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabio Estevam [Mon, 27 Oct 2014 16:49:38 +0000 (14:49 -0200)]
serial: imx: Remove unneeded goto label
Instead of jumping to 'error_out1' label we can simplify the code and return the
error code directly.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabio Estevam [Mon, 27 Oct 2014 16:49:37 +0000 (14:49 -0200)]
serial: imx: Fix the reporting of interrupts
On a imx system with ttymxc0, ttymxc1 and ttymxc4 registered we see the
following output from 'cat /proc/interrupts':
$ cat /proc/interrupts
CPU0
...
58: 39 GIC 58 2020000.serial
67: 115 GIC 67 21f8000.i2c
The only uart irq that appears is ttymxc0, which is the console.
As ttymxc1 and ttymxc4 will only have their irq registered at imx_startup(),
they are not shown right after probe.
Transmitting to ttymxc1 and ttymxc4 will cause their irqs to be registered, but
the output shows:
$ echo "111111" > /dev/ttymxc1
$ echo "444444" > /dev/ttymxc4
$ cat /proc/interrupts
CPU0
...
58: 150 GIC 58 2020000.serial
59: 1 GIC 59
62: 1 GIC 62
67: 115 GIC 67 21f8000.i2c
,which misses printing the associated device address.
In order to fix this, register all the irqs inside the probe function via
devm_request_irq(), which will correctly report the serial interrupts associated
with their correspondent serial device and also helps simplyfing the code by
avoiding the calls to free_irq().
$ echo "111111" > /dev/ttymxc1
$ echo "444444" > /dev/ttymxc4
$ cat /proc/interrupts
CPU0
....
58: 202 GIC 58 2020000.serial
59: 1 GIC 59 21e8000.serial
62: 1 GIC 62 21f4000.serial
67: 115 GIC 67 21f8000.i2c
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kumar Gala [Fri, 17 Oct 2014 09:01:11 +0000 (04:01 -0500)]
tty/serial: earlycon: Fix print for implied MMIO case
For the case in which we just provide an address as an argument to the
earlycon console type like:
earlycon=msm_serial_dm,0xf991e000
We would report this as an IO port based mapping and not as MMIO. Simple
fix to use the port->iotype to decide which message to print.
Signed-off-by: Kumar Gala <galak@codeaurora.org>
Acked-by: Mark RUtland <mark.rutland@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Thu, 6 Nov 2014 03:43:23 +0000 (19:43 -0800)]
Merge branch 'tty-linus' into 'tty-testing'
We need the fixes in drivers/tty/tty_io.c that were done in there for
future patches in this branch.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Wed, 8 Oct 2014 19:57:28 +0000 (21:57 +0200)]
serial/sc16is7xx: Remove obsolete #ifset TIOC[SG]RS485
Commit
e676253b19b2 ("serial/8250: Add support for RS485 IOCTLs") added
references to TIOC[SG]RS48 on 8250_core.c. This change triggered the
need to define them in all the arches that uses tty/serial.
This made #ifdef TIOC[SG]RS48 obsolete.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Ribalda Delgado [Wed, 8 Oct 2014 19:57:27 +0000 (21:57 +0200)]
serial/max310x: Remove obsolete #ifset TIOC[SG]RS485
Commit
e676253b19b2 ("serial/8250: Add support for RS485 IOCTLs") added
references to TIOC[SG]RS48 on 8250_core.c. This change triggered the
need to define them in all the arches that uses tty/serial.
This made #ifdef TIOC[SG]RS48 obsolete.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ray Jui [Wed, 8 Oct 2014 00:35:47 +0000 (17:35 -0700)]
serial: 8250_dw: Add DMA support for non-ACPI platforms
The dma pointer under struct uart_8250_port is currently left
unassigned for non-ACPI platforms. It should be pointing to the dma
member in struct dw8250_data like how it was done for ACPI, so the core
8250 code will try to request for DMA when registering the port
If DMA is not enabled in device tree, request DMA will fail and the
driver will fall back to PIO
Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: JD (Jiandong) Zheng <jdzheng@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Tested-by: Scott Branden <sbranden@broadcom.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Masanari Iida [Tue, 7 Oct 2014 15:25:57 +0000 (00:25 +0900)]
tty: hvcs: Remove unnecessary KERN_ERR in hvcs.c
This patch remove unnecessary KERN_ERR in pr_warning() within hvcs.c
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gregory Hermant [Tue, 30 Sep 2014 06:59:17 +0000 (08:59 +0200)]
max310x: max3109_detect should use indirect addressing in SPI mode for REVID register
This patch allows to read the REV_ID register in SPI mode and consequently
to properly detect the max3109. Indeed in SPI mode, this register is only
accessible by using indirect addressing.
Signed-off-by: Gregory Hermant <gregory.hermant@calao-systems.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Bolle [Mon, 6 Oct 2014 10:07:23 +0000 (12:07 +0200)]
serial: samsung: Remove checks for CONFIG_SAMSUNG_CLOCK
Commit
32726d2d5502 ("ARM: SAMSUNG: Remove legacy clock code") removed
the Kconfig symbol SAMSUNG_CLOCK. Remove the last checks for its macro,
and the dead code they hide, too.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:19:49 +0000 (19:19 +0200)]
tty: ar933x_uart: use container_of to resolve ar933x_uart_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:19:48 +0000 (19:19 +0200)]
serial: use container_of to resolve uart_sunzilog_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:19:47 +0000 (19:19 +0200)]
serial: pnx8xxx: use container_of to resolve pnx8xxx_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:19:46 +0000 (19:19 +0200)]
serial: amba-pl010: use container_of to resolve uart_amba_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:10 +0000 (19:01 +0200)]
serial: sunsab: use container_of to resolve uart_sunsu_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:09 +0000 (19:01 +0200)]
serial: sunsu: use container_of to resolve uart_sunsu_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:08 +0000 (19:01 +0200)]
tty: use container_of to resolve uart_pmac_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:07 +0000 (19:01 +0200)]
TTY: jsm: use container_of to resolve jsm_channel from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:06 +0000 (19:01 +0200)]
serial: cpm_uart: use container_of to resolve uart_cpm_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:05 +0000 (19:01 +0200)]
serial: mpsc: use container_of to resolve mpsc_port_info from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:04 +0000 (19:01 +0200)]
serial: use container_of to resolve uart_ip22zilog_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:03 +0000 (19:01 +0200)]
serial: sa1100: use container_of to resolve sa1100_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fabian Frederick [Sun, 5 Oct 2014 17:01:02 +0000 (19:01 +0200)]
serial: use container_of to resolve uart_sio_port from uart_port
Use container_of instead of casting first structure member.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>