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4547be7809
linux/drivers/serial
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Stanislav Brabec 4547be7809 serial-core: resume serial hardware with no_console_suspend 
Perform a tricky suspend/resume even with no_console_suspend.

With no_console_suspend, kernel skips serial port suspend/resume and the
serial hardware may remain in undefined state after resume. It actually
happens on devices that don't have BIOS that handle serial
initialization. It makes impossible to use serial console after resume.

Devices affected by this problem include:
Sharp Zaurus devices
Several PXA based ARM embedded boards

The patch does:
- Save the hardware state
- Perform buffer flush in time of its suspend call
- Tell the driver that port is suspended
- But still accept new data
- And keep console hardware in state that allows to send them

It allows to capture late console messages without breaking console
after resume.

This is just a resend of a patch discussed in these threads, as the
patch was not yet applied.

"Possible suspend/resume regression in .32-rc?" (Nov 1-5, 2009, ARM
list, later LKML)

"serial-core: resume serial hardware with no_console_suspend" (Sep
15-Oct 18, 2009, LKML & ARM lists)

Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>
Tested-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Tested-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-01-20 15:03:29 -08:00
..
cpm_uart Fix build of cpm_uart due to core changes 2009-09-24 17:01:22 +10:00
jsm jsm: adding EEH handlers 2009-12-11 15:18:03 -08:00
8250_accent.c
8250_acorn.c
8250_boca.c
8250_early.c 8250: switch 8250 drivers to use _nocache ioremaps 2008-05-01 08:04:00 -07:00
8250_exar_st16c554.c
8250_fourport.c
8250_gsc.c serial: 8250_gsc: fix printk format error 2009-05-29 08:40:02 -07:00
8250_hp300.c
8250_hub6.c
8250_mca.c
8250_pci.c serial: add support for the Lava Quattro PCI quad-port 16550A card 2009-11-12 07:25:57 -08:00
8250_pnp.c serial: 8250_pnp: use wildcard for serial Wacom tablets 2010-01-20 15:03:27 -08:00
8250.c Serial: Do not read IIR in serial8250_start_tx when UART_BUG_TXEN 2009-12-11 15:18:05 -08:00
8250.h serial: 8250: add IRQ trigger support 2009-09-19 13:13:19 -07:00
21285.c ARM: 5874/1: serial21285: fix disable_irq-from-interrupt-handler deadlock 2010-01-11 15:39:21 +00:00
68328serial.c serial, 8250: remove NR_IRQ usage 2008-10-16 16:52:02 +02:00
68328serial.h
68360serial.c Fix compile errors in SGI console drivers (linux-next tree) 2008-07-20 17:12:36 -07:00
amba-pl010.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
amba-pl011.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
apbuart.c apbuart: Use of_find_node_by_path to find root node. 2009-11-13 13:25:06 -08:00
apbuart.h sparc: Support for GRLIB APBUART serial port 2009-11-04 08:44:54 -08:00
atmel_serial.c atmel_serial: fix bad BUILD_BUG_ON() usage 2009-10-29 07:39:30 -07:00
bcm63xx_uart.c bcm63xx_uart: Fix serial driver compile breakage. 2009-11-30 16:38:32 -08:00
bfin_5xx.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
bfin_sport_uart.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
bfin_sport_uart.h Blackfin serial driver: this driver enable SPORTs on Blackfin emulate UART 2008-04-30 08:29:30 -07:00
clps711x.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
crisv10.c CRIS: fix defconfig build failure 2009-08-31 18:38:16 +02:00
crisv10.h tty: Use the generic RS485 ioctl on CRIS 2009-04-07 08:44:05 -07:00
dz.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
dz.h
icom.c icom: convert space to tabs 2009-10-01 16:11:15 -07:00
icom.h
imx.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
ioc3_serial.c ioc3/ioc4: various section fixes 2009-12-15 08:53:27 -08:00
ioc4_serial.c ioc3/ioc4: fix error path on driver registration 2009-12-15 08:53:27 -08:00
ip22zilog.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
ip22zilog.h
Kconfig Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2009-12-09 19:03:16 -08:00
kgdboc.c tty: The big operations rework 2008-04-30 08:29:47 -07:00
m32r_sio_reg.h
m32r_sio.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
m32r_sio.h
Makefile sparc: Support for GRLIB APBUART serial port 2009-11-04 08:44:54 -08:00
max3100.c spi: prefix modalias with "spi:" 2009-09-23 07:39:43 -07:00
mcf.c m68knommu: move mcf_remove to .devexit.text 2009-12-04 11:45:30 +10:00
mpc52xx_uart.c drivers/serial/mpc52xx_uart.c: Use UPIO_MEM rather than SERIAL_IO_MEM 2009-10-15 09:58:28 -06:00
mpsc.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
msm_serial.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
msm_serial.h msm_serial: serial driver for MSM7K onboard serial peripheral. 2009-06-22 11:32:25 -07:00
mux.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
netx-serial.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
nwpserial.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
of_serial.c tty/of_serial: add missing ns16550a id 2009-11-30 16:38:44 -08:00
pmac_zilog.c serial/pmac_zilog: Workaround problem due to interrupt on closed port 2010-01-15 13:26:13 +11:00
pmac_zilog.h tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
pnx8xxx_uart.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
pxa.c const: constify remaining dev_pm_ops 2009-12-15 08:53:25 -08:00
s3c24a0.c ARM: S3C: Update Simtec copyright statements from , to - [2] 2009-12-01 01:33:51 +00:00
s3c2400.c ARM: S3C24XX: serial: Fix section mismatch warnings 2009-07-30 23:56:41 +01:00
s3c2410.c ARM: S3C: Update Simtec copyright statements from , to - [2] 2009-12-01 01:33:51 +00:00
s3c2412.c ARM: S3C: Update Simtec copyright statements from , to - [2] 2009-12-01 01:33:51 +00:00
s3c2440.c ARM: S3C: Update Simtec copyright statements from , to - [2] 2009-12-01 01:33:51 +00:00
s3c6400.c ARM: S3C64XX: serial: Fix section mismatch warning 2009-07-30 23:56:41 +01:00
sa1100.c ARM: Fix SA1100 Neponset serial section mismatch 2009-09-28 18:06:16 +01:00
samsung.c ARM: S3C: Update Simtec copyright statements from , to - [2] 2009-12-01 01:33:51 +00:00
samsung.h ARM: S3C: Update Simtec copyright statements from , to - [2] 2009-12-01 01:33:51 +00:00
sb1250-duart.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
sc26xx.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
serial_core.c serial-core: resume serial hardware with no_console_suspend 2010-01-20 15:03:29 -08:00
serial_cs.c pcnet_cs: add cis of KTI PE520 pcmcia network card 2010-01-06 20:37:58 -08:00
serial_ks8695.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
serial_lh7a40x.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
serial_txx9.c serial_txx9: use container_of() instead of direct cast 2009-10-01 16:11:15 -07:00
sh-sci.c serial: sh-sci: using correct fifo size for SCIF and SCIFA ports. 2010-01-15 08:33:20 +09:00
sh-sci.h serial: sh-sci: Convert tremaining ctrl_xxx I/O routines to __raw_xxx. 2009-12-24 14:52:43 +09:00
sn_console.c serial: kill off uart_info 2009-09-19 13:13:28 -07:00
suncore.c serial: suncore: Fix RSC/LOM handling in sunserial_console_termios(). 2009-11-24 14:09:56 -08:00
suncore.h serial: suncore: Fix RSC/LOM handling in sunserial_console_termios(). 2009-11-24 14:09:56 -08:00
sunhv.c serial: suncore: Fix RSC/LOM handling in sunserial_console_termios(). 2009-11-24 14:09:56 -08:00
sunsab.c serial: suncore: Fix RSC/LOM handling in sunserial_console_termios(). 2009-11-24 14:09:56 -08:00
sunsab.h
sunsu.c sunsu: Use sunserial_console_termios() in sunsu_console_setup(). 2009-11-24 14:12:50 -08:00
sunzilog.c serial: suncore: Fix RSC/LOM handling in sunserial_console_termios(). 2009-11-24 14:09:56 -08:00
sunzilog.h
timbuart.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
timbuart.h serial: Added Timberdale UART driver 2009-06-11 08:51:06 -07:00
uartlite.c uartlite: support shared interrupt lines 2009-09-19 13:13:38 -07:00
ucc_uart.c firmware_class: make request_firmware_nowait more useful 2009-12-11 11:24:52 -08:00
vr41xx_siu.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
zs.c serial: move delta_msr_wait into the tty_port 2009-09-19 13:13:31 -07:00
zs.h