[Xen-devel] [PATCHv2 0/5] Add UART support and arch timer initialization for OMAP5

[Chen Baozi <baozich@xxxxxxxxx>]

Since OMAP UART has a few distinct features than common 8250 UART, I
re-implemented its driver rather than porting it based on ns16550.c.
There are mainly two big differences between the implementations. First,
OMAP UART introduces the concept of register access mode, which divides
the register map into seperated space. Switching the access mode is then
necessary when configuring it. Second, THRE interrupt needs to be disable
after finished transmission and enabled once transmission started. This
is because the semantic of THRE interrupt differs from common 8250 in TI's
implementation, which would be generated if TX FIFO below trigger level
and cannot be cleared by simply write to THR once.

Besides UART driver, arch timer initialization for OMAP5432 platform
is also done in this patch series.

Chen Baozi (5):
  xen: rename ns16550-uart.h to 8250-uart.h and fix some typos
  xen/arm: add 8250 compatible UART support for early_printk
  xen/arm: Add the new OMAP UART driver.
  xen/arm: Introduce platform recognition codes for the OMAP5
  xen/arm: Add OMAP5 architected timer initialization codes.

 config/arm32.mk                                 |   1 +
 docs/misc/arm/early-printk.txt                  |   1 +
 xen/arch/arm/Rules.mk                           |   4 +
 xen/arch/arm/arm32/debug-8250.inc               |  41 +++
 xen/arch/arm/platforms/Makefile                 |   1 +
 xen/arch/arm/platforms/omap5.c                  | 113 ++++++++
 xen/arch/arm/time.c                             |   7 +-
 xen/drivers/char/Makefile                       |   1 +
 xen/drivers/char/ns16550.c                      |   2 +-
 xen/drivers/char/omap-uart.c                    | 358 ++++++++++++++++++++++++
 xen/include/asm-arm/platforms/omap5.h           |  38 +++
 xen/include/xen/{ns16550-uart.h => 8250-uart.h} |  98 ++++++-
 12 files changed, 651 insertions(+), 14 deletions(-)
 create mode 100644 xen/arch/arm/arm32/debug-8250.inc
 create mode 100644 xen/arch/arm/platforms/omap5.c
 create mode 100644 xen/drivers/char/omap-uart.c
 create mode 100644 xen/include/asm-arm/platforms/omap5.h
 rename xen/include/xen/{ns16550-uart.h => 8250-uart.h} (52%)

-- 
1.8.1.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel