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path: root/drivers/serial/bfin_5xx.c
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* serial: kill off uart_infoAlan Cox2009-09-191-10/+10
| | | | | | | | We moved this into uart_state, now move the fields out of the separate structure and kill it off. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial: bfin_5xx: fix building as module when early printk is enabledMike Frysinger2009-09-191-0/+4
| | | | | | | | | | | | | | Since early printk only makes sense/works when the serial driver is built into the kernel, disable the option for this driver when it is going to be built as a module. Otherwise we get build failures due to the ifdef handling. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: stable <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* serial: bfin_5xx: fix building as module when early printk is enabledMike Frysinger2009-06-221-0/+4
| | | | | | | | | | | Since early printk only makes sense/works when the serial driver is built into the kernel, disable the option for this driver when it is going to be built as a module. Otherwise we get build failures due to the ifdef handling. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* serial: bfin_5xx: add missing spin_lock initMike Frysinger2009-06-221-0/+1
| | | | | | | | | | The Blackfin serial driver never initialized the spin_lock that is part of the serial core structure, but we never noticed because spin_lock's are rarely enabled on UP systems. Yeah lockdep and friends. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: disable dma rx interrupt only rather than all irqsSonic Zhang2009-06-111-3/+4
| | | | | | | | | | | | The UART RX handling code isn't exactly speeding, so don't go disabling all interrupts when processing the buffer. Just disable the relevant DMA interrupt. This greatly improves latency of the system when utilizing the UART. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: handle anomaly 05000231Sonic Zhang2009-06-111-2/+10
| | | | | | | | | | | 05000231 - UART STB Bit Incorrectly Affects Receiver Setting For processors affected by this, we cannot safely allow CSTOPB to be set as the UART will then be unable to properly clock in bytes. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: annotate anomalies 05000215 and 05000099Sonic Zhang2009-06-111-0/+14
| | | | | | | | | | | | | | | | | | Add some comments for how these anomalies are addressed: 05000215 - UART TX Interrupt Masked Erroneously We always clear ETBEI within last UART TX interrupt to end a string. It is always set when starting a new tx transfer. 05000099 - UART Line Status Register (UART_LSR) Bits Are Not Updated at the Same Time This anomaly affects driver only in POLL code where multi bits of UART_LSR are checked. It doesn't affect current bfin_5xx.c driver. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: handle irregular DMA register status in auto start modeSonic Zhang2009-06-111-3/+4
| | | | | | | | | | | | | | | | This bug is caused by irregular behavior of DMA register CURR_X_COUNT and CURR_Y_COUNT when an auto restart uart rx DMA run to last byte in DMA buffer, trigger the interrupt and stay at this possiton. The status of current x and y is 0:7 instead of 512:8 or 0:8. The driver doesn't take care of this case when calculating the position. URL: http://blackfin.uclinux.org/gf/tracker/5063 Reported-by: Tomasz Motylewski <t.motylewski@bfad.de> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: fix missing new lines when under loadGraf Yang2009-06-111-0/+1
| | | | | | | | | | | | Add a SSYNC() into bfin_serial_dma_tx_chars() to ensure DMA registers are written with new data otherwise we might miss a byte or two when the system is under load. PIO mode is OK though. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: fix baudrate for early_printkRobin Getz2009-06-111-1/+6
| | | | | | | | | | | | | | Since we already setup the early console UART in arch/blackfin/kernel/early_printk.c, and common functions which are enabled from the .setup will override the proper settings later, don't fill in these structures. Otherwise we get mangled baudrate settings when using early_printk. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: fix error while transferring large filesSonic Zhang2009-06-111-2/+29
| | | | | | | | | | | Ignore receiving data if new position is in the same line of current buffer tail and is small. This should decrease overruns. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* bfin_5xx: misplaced parenthesesRoel Kluin2009-04-211-3/+3
| | | | | | | | | | | `!' has a higher precedence than `&', parentheses are misplaced. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Acked-by: Sonic Zhang <sonic.zhang@analog.com> Cc: Bryan Wu <cooloney@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tty: Blackin CTS/RTSSonic Zhang2009-04-071-52/+117
| | | | | | | | | | | | | | | Both software emulated and hardware based CTS and RTS are enabled in serial driver. The CTS RTS PIN connection on BF548 UART port is defined as a modem device not as a host device. In order to test it under Linux, please nake a cross UART cable to exchange CTS and RTS signal. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Change hardware flow control from poll to interrupt drivenSonic Zhang2009-04-071-49/+82
| | | | | | | | | | Only the CTS bit is affected. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* blackfin: Subtract ANOMALY_05000230 on quotGraf Yang2009-04-061-1/+1
| | | | | | | | | Fix bug - up arrow key works abnormal for bf561 ezkit board Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix DMA rx ring buffer handlingSonic Zhang2009-04-061-1/+3
| | | | | | | | Reported-by: Qian Zhang <zhangq@sansitech.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* blackfin: Fix tty compile error in PIO modeSonic Zhang2009-04-061-2/+2
| | | | | | | | | | | | Fixes this compile issue: drivers/serial/bfin_5xx.c: In function bfin_serial_rx_chars: drivers/serial/bfin_5xx.c:178: error: struct uart_info has no member named tty Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* blackfin: Use unsigned long for flags with irq functionsMike Frysinger2009-04-061-2/+3
| | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Remove BI status for known_good_charSonic Zhang2009-01-021-0/+1
| | | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Fix bug - BF527-EZKIT unable to receive large files ↵Sonic Zhang2009-01-021-3/+8
| | | | | | | | | | | over UART in DMA mode Add spin_lock_irqsave() when receive and transfer data. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Clean serial console and early prink code.Sonic Zhang2009-01-021-12/+4
| | | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: fix bug - SIR driver stop receiving randomlyGraf Yang2009-01-021-0/+24
| | | | | | | | | | | | | | | | | | | | | | | | | Bug description: The IRDA receiver may can't receiving any more after processed some signals. To duplicate this issue is put three IRDA devices together, one blackfin, two none blackfin, they will detect each other. Let one none blackfin devices irdaping the blackfin devices, when it stopped print out ping information, it is the time that blackfin stoped receiving, the time is random. The related register bit is OK, the other devices is sending data continuously. But no interrupt come. Fixing: I tried Michael's suggestion that request the UARTx error interrupt, and reset the IRDA when found FE error. This method helps much, but it can't completely avoid stop. Reset the IRDA before every time sending the data is more safe. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: updates kgdb over Blackfin serial driver with kgdb ↵Sonic Zhang2009-01-021-98/+89
| | | | | | | | | framework Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Fix bug - request UART2/3 peripheral mapped ↵Sonic Zhang2008-10-131-0/+50
| | | | | | | | | interrupts in PIO mode Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Fix bug - ircp fails on sir over Blackfin UARTGraf Yang2008-10-131-0/+4
| | | | | | | | | | We now use the sir_dev/irtty_sir/uart/bfin_serial drivers framework to monitor the TX status. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Fix bug - Don't call tx_stop in tx_transfer.Sonic Zhang2008-10-131-1/+5
| | | | | | | | | Disable irq and return immediately. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Remove useless stopSonic Zhang2008-10-131-3/+0
| | | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: move common variables out of serial headers and into ↵Mike Frysinger2008-10-131-7/+10
| | | | | | | | | | | | | the serial driver move common variables out of serial headers and into the serial driver and rename "nr_ports" to "nr_active_ports" so as to easily differentiate between BFIN_UART_NR_PORTS (the # of available) and nr_ports (the # of enabled) Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: trim trailing whitespace -- no functional changesMike Frysinger2008-10-131-4/+4
| | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Fix bug - should suspend/resume/remove all uart ports.Sonic Zhang2008-10-131-17/+22
| | | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: use __initdata for data, not __initMike Frysinger2008-10-131-1/+1
| | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin arch: move include/asm-blackfin header files to arch/blackfinBryan Wu2008-08-271-1/+1
| | | | | Signed-off-by: Bryan Wu <cooloney@kernel.org>
* blackfin: Fix compile failure in tty codeAlan Cox2008-08-041-1/+1
| | | | | | | | | Blackfin peers into the ldisc in an odd way for IRDA snooping which therefore got missed. Simple enough fix. Closes bug #11233 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Fix compile errors in SGI console drivers (linux-next tree)Takashi Iwai2008-07-201-5/+5
| | | | | | | | | | The below is the patch to replace blindly all possible places, including Jack's fixes. Signed-off-by: Takashi Iwai <tiwai@suse.de> (Reviewed and checked rather than blindly added) Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Use timer to poll CTS PIN instead of workqueue.Sonic Zhang2008-06-191-22/+18
| | | | | | | | | This allows other threads to run when the serial driver polls the CTS PIN in a loop. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin serial driver: fix up tty core set_ldisc API change breakage bugGraf Yang2008-06-071-5/+5
| | | | | | | | | This is the patch that follows Linus's modification about set_ldisc. Graf has built and tested it on BF537 using Linus's git Tree. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: Clean up BF54x macro in blackfin UART driver.Sonic Zhang2008-06-031-25/+5
| | | | | | | | Hide difference in head file. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: abstract away DLAB differences into headerMike Frysinger2008-05-071-33/+7
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: macro away the IER differences between processorsMike Frysinger2008-05-071-54/+4
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* serial: replace remaining __FUNCTION__ occurrencesHarvey Harrison2008-04-301-2/+2
| | | | | | | | __FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: fix bug - use mod_timer to replace only add_timer.Sonic Zhang2008-04-251-5/+2
| | | | | | | | | | http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=4045 If adding timer in both timer handler and rx interrupt, a timer may be added when it is till in the pending list. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: the uart break anomaly has been given its own ↵Mike Frysinger2008-04-251-6/+3
| | | | | | | | number, so switch to it Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: use BFIN_UART_NR_PORTS to help SIR driver in uart port.Graf Yang2008-04-251-3/+5
| | | | | | Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: Fix bug - kernel hangs when accessing uart 0 on ↵Sonic Zhang2008-04-231-4/+0
| | | | | | | | | | | bf537 when booting u-boot and linux on uart 1 Wait only when this UART is enabled. http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3995 Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: punt unused lsr variableMike Frysinger2008-04-241-1/+1
| | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: Enable IR function when user application (irattach ↵Graf Yang2008-02-291-0/+26
| | | | | | | | /dev/ttyBFx -s) call TIOCSETD ioctl with line discipline N_IRDA Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* serial: fix platform driver hotplug/coldplugKay Sievers2008-04-151-0/+2
| | | | | | | | | | | | | | | | | Since 43cc71eed1250755986da4c0f9898f9a635cb3bf, the platform modalias is prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable serial platform drivers, to re-enable auto loading. NOTE that Kconfig for some of these drivers doesn't allow modular builds, and thus doesn't match the driver source's unload support. Presumably their unload code is buggy and/or weakly tested... [dbrownell@users.sourceforge.net: more drivers, registration fixes] Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin Serial Driver: Fix bug - Only insert UART rx char in timer task.Sonic Zhang2008-02-291-16/+7
| | | | | | | | http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3910 Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: Fix bug - update tx dma buffer tail before wake up ↵Sonic Zhang2008-02-251-22/+29
| | | | | | | | | | processes. Also make rx dma buffer work as a loop. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin Serial Driver: Fix bug - Increase buffer tail immediately before ↵Sonic Zhang2008-02-251-14/+18
| | | | | | | | | | starting tx dma. http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=2920 Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
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