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* n_gsm: Send CLD command on exitAlan Cox2011-08-26
| | | | | | | | | A DISC on DLCI 0 should close down the mux but Michael Lauer reports this is not the case for some modems. Send a CLD as well. Signed-off-by: Alan Cox <alan@linux.intel.com> Tested-by: Michael Lauer Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* n_gsm: update TODO listAlan Cox2011-08-26
| | | | | | | This is now out of date so fix it Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* hsu: add runtime pm supportKristen Carlson Accardi2011-08-26
| | | | | | | | | Doesn't appear to be much to do here, however having the suspend/resume functions will allow the d3/d0 transitions to be sent by the pci core. Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: use tty_wait_until_sent_from_close in other driversJiri Slaby2011-08-25
| | | | | | | | | | | | | | Let's use the newly added helper to avoid stalls in drivers which are not yet ported to tty_port helpers. Those which are broken (call tty_wait_until_sent with irqs disabled) are left untouched. They are in a deeper trouble than we are trying to solve here. This includes amiserial, 68328serial, 68360serial and crisv10. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: use tty_wait_until_sent_from_close in tty_port_close_startJiri Slaby2011-08-25
| | | | | | | | | | | | | Let's use the newly added helper to avoid stalls in drivers which are already ported to tty_port helpers. We have to ensure here, that there is no user of tty_port_close_start and tty_port_close which holds port->mutex (or other) lock over them. And sure, there is none. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: serial, move locking in uart_closeJiri Slaby2011-08-25
| | | | | | | | | | | | | | | | | | | | | So now, when we handle CLOSING flag, there is no point to hold port->mutex over the start of uart_close. Yes, there are still several things to reason about: * port->count etc is and always was protected by a spinlock * ->stop_rx is protected by a spinlock. Otherwise it would race with interrupts. * uart_wait_until_sent -- that one is already called without port->mutex from set_termios and tty_set_ldisc. Should anything be protected there, it would be tx_empty. And by a spinlock. 8250 does this internally... This step is needed to fix system stalls. To not create an AB-BA lock dependency (see next patches). Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: serial, use ASYNCB_CLOSING in uart_closeJiri Slaby2011-08-25
| | | | | | | | | | | | | | | | | | | We need to move port->mutex locking after wait_until_sent in uart_close (for rationale see next patches). But if we did it now, we would introduce a race between close and open. This is exactly why port->mutex is locked at the top of uart_close. To avoid the race, we add ASYNCB_CLOSING to uart_close. Like every other sane TTY driver. Thanks to tty_port_block_til_ready used in uart_open we will have this for free. Then we can move the port->mutex lock. Also note that this will make the conversion to tty_port helpers easier. They are currently handling ASYNC_CLOSING flag correctly. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* jsm: print byte we are dequeingThadeu Lima de Souza Cascardo2011-08-24
| | | | | | | | Instead of printing the head of the buffer, we should print the tail, which is the byte we are sending to the device. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* jsm: remove buggy write queueThadeu Lima de Souza Cascardo2011-08-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | jsm uses a write queue that copies from uart_core circular buffer. This copying however has some bugs, like not wrapping the head counter. Since this write queue is also a circular buffer, the consumer function is ready to use the uart_core circular buffer directly. This buggy copying function was making some bytes be dropped when transmitting to a raw tty, doing something like this. [root@hostname ~]$ cat /dev/ttyn1 > cascardo/dump & [1] 2658 [root@hostname ~]$ cat /proc/tty/drivers > /dev/ttyn0 [root@hostname ~]$ cat /proc/tty/drivers /dev/tty /dev/tty 5 0 system:/dev/tty /dev/console /dev/console 5 1 system:console /dev/ptmx /dev/ptmx 5 2 system /dev/vc/0 /dev/vc/0 4 0 system:vtmaster jsm /dev/ttyn 250 0-31 serial serial /dev/ttyS 4 64-95 serial hvc /dev/hvc 229 0-7 system pty_slave /dev/pts 136 0-1048575 pty:slave pty_master /dev/ptm 128 0-1048575 pty:master unknown /dev/tty 4 1-63 console [root@hostname ~]$ cat cascardo/dump /dev/tty /dev/tty 5 0 system:/dev/tty /dev/console /dev/console 5 1 system:console /dev/ptmx /dev/ptmx 5 2 system /dev/vc/0 /dev/vc/0 4 0 system:vtmaste[root@hostname ~]$ This patch drops the driver write queue entirely, using the circular buffer from uart_core only. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* jsm: remove remaining flip buffer codeThadeu Lima de Souza Cascardo2011-08-24
| | | | | | | | The flip buffer is not used anymore. Remove its allocation and declaration in the board structure. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: Add support serial for EXYNOS4212 SoCKukjin Kim2011-08-24
| | | | | | | | | | According to add support EXYNOS4212 SoC, we need to enable SERIAL_S5PV210 on EXYNOS4212. Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* atmel_serial: RS485: receiving enabled when sending dataBernhard Roth2011-08-24
| | | | | | | | | | | By default the atmel_serial driver in RS485 mode disables receiving data until all data in the send buffer has been sent. This flag allows to receive data even whilst sending data. Signed-off-by: Bernhard Roth <br@pwrnet.de> Signed-off-by: Claudio Scordino <claudio@evidence.eu.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial/imx: support to handle break characterHui Wang2011-08-24
| | | | | | | | | | | | | | | | | | | | | | | The imx UART hardware controller can identify BREAK character and the imx_set_termios() can accept BRKINT set by users, but current existing imx_rxint() can't pass BREAK character and TTY_BREAK to the tty layer as other serial drivers do (8250.c omap_serial.c). Here add code to handle BREAK character and pass it to tty layer. To detect error occurrence, i use URXD_ERR to replace (URXD_OVRRUN | URXD_FRMERR | ...) because any kind of error occurs, URXD_ERR will always be set to 1. I put the URXD_BRK to the first place to check since when BREAK error occurs, not only URXD_BRK is set to 1, but also URXD_PRERR and URXD_FRMERR are all set to 1. This arrangement can filter out fake parity and frame errors when BREAK error occurs. Signed-off-by: Hui Wang <jason77.wang@gmail.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Revert "tty: serial8250: add helpers for the DesignWare 8250"Greg Kroah-Hartman2011-08-24
| | | | | | | | | | | This reverts commit 6b1a98d1c4851235d9b6764b3f7b7db7909fc760. It causes a build error that needs to be resolved differently. Cc: Alan Cox <alan@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Revert "tty: of_serial: add support for the DesignWare 8250"Greg Kroah-Hartman2011-08-24
| | | | | | | | | | | This reverts commit 14a8d47d4e9f51372996914c16bdbf1c34e209b5. It causes a build error that needs to be resolved differently. Cc: Alan Cox <alan@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: of_serial: add support for the DesignWare 8250Jamie Iles2011-08-23
| | | | | | | | | | | Support the DesignWare 8250 by a new compatible string and registering the DesignWare helpers. If the registration of the helpers fails, then continue as a normal 8250 as we may still get some useful debug out. Cc: Alan Cox <alan@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: serial8250: add helpers for the DesignWare 8250Jamie Iles2011-08-23
| | | | | | | | | | | | | The Synopsys DesignWare 8250 is an 8250 that has an extra interrupt that gets raised when writing to the LCR when busy. To handle this we need special serial_out, serial_in and handle_irq methods. Add a new function serial8250_use_designware_io() that configures a uart_port with these accessors. Cc: Alan Cox <alan@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: serial8250: remove UPIO_DWAPB{,32}Jamie Iles2011-08-23
| | | | | | | | | | Now that platforms can override the port IRQ handler and the only user of these UPIO modes has been converted over, kill off UPIO_DWAPB and UPIO_DWAPB32. Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: serial8250: allow platforms to override irq handlerJamie Iles2011-08-23
| | | | | | | | | | | | Some ports (e.g. Synopsys DesignWare 8250) have special requirements for handling the interrupts. Allow these platforms to specify their own interrupt handler that will override the default. serial8250_handle_irq() is provided so that platforms can extend the IRQ handler rather than completely replacing it. Signed-off-by: Jamie Iles <jamie@jamieiles.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial: samsung: Add unified interrupt handler for s3c64xx and later SoC'sThomas Abraham2011-08-23
| | | | | | | | | | | | | | | | s3c64xx and later SoC's include the interrupt mask and pending registers in the uart controller, unlike the s3c24xx SoC's which have these registers in the interrupt controller. When the mask and pending registers are part of the uart controller, a unified interrupt handler can handle the tx/rx interrupt. With this, the static reservation of interrupt numbers for the uart tx/rx/err interrupts in the linux irq space is not required and simplifies adding device tree support. Suggested-by: Grant Likely <grant.likely@secretlab.ca> CC: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial:bfin_uart: Put TX IRQ in individual platform resource.Sonic Zhang2011-08-23
| | | | | | | | Serial TX IRQ is not RX IRQ plus 1 in some blackfin chips. Give individual platform resources to both TX and RX irqs. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty: clearify structure initializer in notify_write()Mathias Krause2011-08-23
| | | | | | | | | | | | | | Even though this is valid C we should not mix C99 initializers with obfuscated ANSI C. Stick to C99 and initialize c by its name. Found by clang: drivers/tty/vt/vt.c:262:55: warning: explicitly assigning a variable of type 'unsigned int' to itself [-Wself-assign] struct vt_notifier_param param = { .vc = vc, unicode = unicode }; ~~~~~~~ ^ ~~~~~~~ Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial:blackfin: rename Blackfin serial driver to bfin_uart.cSonic Zhang2011-08-23
| | | | | | | | bfin_5xx.c is not a general name for all Blackfin chips. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial:blackfin: Correct coding style in bfin serial driver.Sonic Zhang2011-08-23
| | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Acked-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: mxser+cyclades remove wait_until_sent debug codeJiri Slaby2011-08-23
| | | | | | | | | | | | It makes the code really ugly. And since it can be enabled only before building and only in the source files, it can be barely used by users. That said, I've not seen anybody to use it in the past few years. This crap is copied to some more drivers over the tty tree. Since I'm not their maintainer, I'm not sure if I should remove them too? Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: remove tty_lockedJiri Slaby2011-08-23
| | | | | | | | | | | | We used it really only serial and ami_serial. The rest of the callsites were BUG/WARN_ONs to check if BTM is held. Now that we pruned tty_locked from both of the real users, we can get rid of tty_lock along with __big_tty_mutex_owner. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: ami_serial, remove BTM from wait_until_sentJiri Slaby2011-08-23
| | | | | | | | | | | | | | | | | | The same as in "TTY: serial, remove BTM from wait_until_sent" we don't need to take BTM in wait_until_sent of ami_serial. Exactly the same as serial, ami_serial accesses some "info" members (xmit_fifo_size, timeout), but their assignment on other places in the code is not protected by BTM anyway. So the BTM protects nothing here. This removal helps us to get rid of tty_locked() and __big_tty_mutex_owner in the following patch. This was suggested by Arnd. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@linux.intel.com> Cc: Andreas Bombe <aeb@debian.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: serial, remove tasklet for tty_wakeupJiri Slaby2011-08-23
| | | | | | | | | | tty_wakeup can be called from any context. So there is no need to have an extra tasklet for calling that. Hence save some space and remove the tasklet completely. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: msm_serial, remove unneeded console setJiri Slaby2011-08-23
| | | | | | | | | | | | | | | | | It doesn't make sense to set console to uart_port in console->setup. At that time the console is set by uart_add_one_port already. The call chain looked like: uart_add_one_port() uport->cons = drv->cons; <= once uart_configure_port() register_console() console->setup() port->cons = co; <= second time Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* TTY: serial, remove BTM from wait_until_sentJiri Slaby2011-08-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During the BKL removal process, the BKL was switched to tty_lock (BTM). Now we should start pruning the BTM further. Let's start with wait_until_sent of the serial layer. This will allow us to switch to the tty port helpers and thus clean it up much. In wait_until_sent there are some uport members accessed, but neither of them is protected by BTM at the location they are set ('=>' means function call): * uport->fifosize (set in tty_ioctl => uart_ioctl => uart_set_info) * uport->type (set in add_one_port prior to tty_register_device) * uport->timeout (set usually in tty_ioctl => tty_mode_ioctl => tty_set_termios => uart_set_termios => uart_change_speed => uport->ops->set_termios => uart_update_timeout) * call to uport->ops->tx_empty() If the tx_empty hook needs some lock to protect accesses to registers, it should take &uport->lock spinlock like 8250 does. Otherwise there still might be races e.g. with ISRs. This should also fix the issue Andreas is seeing (BTM in comparison to BKL doesn't have any hidden functionality like unlocking during sleeping). Signed-off-by: Jiri Slaby <jslaby@suse.cz> References: https://lkml.org/lkml/2011/5/25/562 Cc: Alan Cox <alan@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Andreas Bombe <aeb@debian.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* drivers/tty/synclink: remove double commentEdwin van Vliet2011-08-23
| | | | | | | | Redundant comment line was removed Signed-off-by: Edwin van Vliet <edwin@cheatah.nl> Reviewed-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* tty/powerpc: introduce the ePAPR embedded hypervisor byte channel driverTimur Tabi2011-08-23
| | | | | | | | | | | | | | | | | | | | | The ePAPR embedded hypervisor specification provides an API for "byte channels", which are serial-like virtual devices for sending and receiving streams of bytes. This driver provides Linux kernel support for byte channels via three distinct interfaces: 1) An early-console (udbg) driver. This provides early console output through a byte channel. The byte channel handle must be specified in a Kconfig option. 2) A normal console driver. Output is sent to the byte channel designated for stdout in the device tree. The console driver is for handling kernel printk calls. 3) A tty driver, which is used to handle user-space input and output. The byte channel used for the console is designated as the default tty. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* sh: Fix boot crash related to SCIRafael J. Wysocki2011-08-07
| | | | | | | | | | | | Commit d006199e72a9 ("serial: sh-sci: Regtype probing doesn't need to be fatal.") made sci_init_single() return when sci_probe_regmap() succeeds, although it should return when sci_probe_regmap() fails. This causes systems using the serial sh-sci driver to crash during boot. Fix the problem by using the right return condition. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dt: remove of_alias_get_id() referenceGrant Likely2011-08-04
| | | | | | | | | | | | | | of_alias_get_id() is broken and being reverted. Remove the reference to it and replace with a single incrementing id number. There is no risk of regression here on the imx driver since the imx change to use of_alias_get_id() is commit 22698aa2, "serial/imx: add device tree probe support" which is new for v3.1, and it won't get used unless CONFIG_OF is enabled and the board is booted using a device tree. A single incrementing integer is sufficient for now. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Shawn Guo <shawn.guo@linaro.org>
* Merge branch 'sh-latest' of ↵Linus Torvalds2011-08-01
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x * 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x: (39 commits) SH: static should be at beginning of declaration sh: move CLKDEV_xxx_ID macro to sh_clk.h sh: clock-shx3: add CLKDEV_ICK_ID for cleanup sh: clock-sh7786: add CLKDEV_ICK_ID for cleanup sh: clock-sh7785: add CLKDEV_ICK_ID for cleanup sh: clock-sh7757: add CLKDEV_ICK_ID for cleanup sh: clock-sh7366: add CLKDEV_ICK_ID for cleanup sh: clock-sh7343: add CLKDEV_ICK_ID for cleanup sh: clock-sh7722: add CLKDEV_ICK_ID for cleanup sh: clock-sh7724: add CLKDEV_ICK_ID for cleanup sh: clock-sh7366: modify I2C clock settings sh: clock-sh7343: modify I2C clock settings sh: clock-sh7723: modify I2C clock settings sh: clock-sh7722: modify I2C clock settings sh: clock-sh7724: modify I2C clock settings serial: sh-sci: Fix up pretty name printing for port IRQs. serial: sh-sci: Kill off per-port enable/disable callbacks. serial: sh-sci: Add missing module description/author bits. serial: sh-sci: Regtype probing doesn't need to be fatal. sh: Tidy up pre-clkdev clk_get() error handling. ...
| *-. Merge branches 'common/serial-rework' and 'sh/stable-updates' into sh-latestPaul Mundt2011-06-29
| |\ \
| | * | serial: sh-sci: Fix up pretty name printing for port IRQs.Paul Mundt2011-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Presently these were all using the same static string with no regard to dev_name() and the like. This implements a bit of rework to name the IRQ dynamically, as it should have been doing all along anyways. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Kill off per-port enable/disable callbacks.Paul Mundt2011-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ultimately we want everything to be going through the clock framework and runtime pm, so kill off the per-port callbacks that enabled ports to bypass the common infrastructure. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Add missing module description/author bits.Paul Mundt2011-06-28
| | | | | | | | | | | | | | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Regtype probing doesn't need to be fatal.Paul Mundt2011-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This was using a BUG_ON(), but it's not strictly necessary, so relax the constraints a bit. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | | |
| | \ \
| *-. \ \ Merge branches 'common/dma' and 'sh/stable-updates' into sh-latestPaul Mundt2011-06-16
| |\ \ \ \ | | | |_|/ | | |/| |
| * | | | Merge branch 'common/serial-rework' into sh-latestPaul Mundt2011-06-15
| |\ \ \ \ | | |_|/ / | |/| | / | | | |/ | | |/|
| | * | serial: sh-sci: Support generic SCLSR overrun detection.Paul Mundt2011-06-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For all ports with a valid SCLSR register we can use the generic FIFO overrun detection logic. Test the validity of the SCLSR register rather than depending explicitly on port type, which can be ambiguous for the SCIFA/B types. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: FIFO sizing helper consolidation.Paul Mundt2011-06-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This consolidates all of the TX/RX fill/room nonsense in to a single set of fairly heavyweight definitions. The implementation goes in descending order of complexity, testing the register map for capabilities until we run out of options and do it the legacy SCI way. Masks are derived directly from the per-port FIFO size, meaning that platforms with FIFO sizes not matching the standard port types will still need to manually fix them up. This also fixes up a number of issues such as tx_empty being completely bogus for SCI and IrDA ports, some ports using masks smaller or greater than their FIFO size, and so forth. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Abstract register maps.Paul Mundt2011-06-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This takes a bit of a sledgehammer to the horribly CPU subtype ifdef-ridden header and abstracts all of the different register layouts in to distinct types which in turn can be overriden on a per-port basis, or permitted to default to the map matching the port type at probe time. In the process this ultimately fixes up inumerable bugs with mismatches on various CPU types (particularly the legacy ones that were obviously broken years ago and no one noticed) and provides a more tightly coupled and consolidated platform for extending and implementing generic features. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: More unused define purging.Paul Mundt2011-06-08
| | | | | | | | | | | | | | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Consolidate RXD pin handling.Paul Mundt2011-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Non-SCI parts do not have the special port reg necessary for cases where the RX and SCI pins are muxed and need to be manually polled, so these like always fall back on the normal FIFO processing paths. SH7760 is in a class in and of itself with regards to mapping its SIM card interface via the SCI port class despite not having any of the RXD lines wired up and so implicitly behaving more like a SCIF in this regard. Out of the other CPUs, some support the port check via the same block while others do it through an external SuperI/O, so it's not even possible to perform the check relative to the ioremapped cookie offset, so the separate read semantics are preserved here, too. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Generalize overrun handling.Paul Mundt2011-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This consolidates all of the broken out overrun handling and ensures that we have sensible defaults per-port type, in addition to making sure that overruns are flagged appropriately in the error mask for parts that haven't explicitly disabled support for it. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Kill off some more unused definitions.Paul Mundt2011-06-08
| | | | | | | | | | | | | | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| | * | serial: sh-sci: Tidy up ioread/write wrappers, kill off unused SCI helper.Paul Mundt2011-06-08
| | | | | | | | | | | | | | | | Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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