src/sys/dev/uart/uart_dev_lpc.c, branch upstream/11.1.0

MFC r317659, r317752:

2017-05-16T00:21:03+00:00

Make some UART consoles to not spin wait for data to be sent.

At least with Tx FIFO enabled it shows me ~10% reduction of verbose boot
time with serial console at 115200 baud.

sys/dev: minor spelling fixes.

2016-05-03T03:41:25+00:00

Most affect comments, very few have user-visible effects.

Stop using the global fdtbus_bs_tag and instead use the tag from the softc

2016-02-23T03:34:36+00:00

that was set up properly at init time.

UART: Fix spurious interrupts generated by ns8250 and lpc drivers:

2016-02-12T05:14:58+00:00

 - don't enable transmitter empty interrupt before filling TX FIFO.
 - add missing uart_barrier() call in interrupt service routine

Add support for the uart classes to set their default register shift value.

2015-04-11T17:16:23+00:00

This is needed with the pl011 driver. Before this change it would default
to a shift of 0, however the hardware places the registers at 4-byte
addresses meaning the value should be 2.

This patch fixes this for the pl011 when configured using the fdt. The
other drivers have a default value of 0 to keep this a no-op.

MFC after:	1 week

Move the uart_class definitions and fdt compat data into the individual

2015-03-07T15:24:15+00:00

uart implementations, and export them using the new linker-set mechanism.

Differential Revision:	https://reviews.freebsd.org/D1993
Submitted by:	Michal Meloun

Introduce grab and ungrab upcalls. When the kernel desires to grab the

2014-01-19T19:39:13+00:00

console, it calls the grab functions. These functions should turn off
the RX interrupts, and any others that interfere. This makes mountroot
prompt work again. If there's more generalized need other than
prompting, many of these routines should be expanded to do those new
things.

Should have been part of r260889, but waasn't due to command line typo.

Reviewed by:	bde (with reservations)

Convert from using fdt_immr style to arm_devmap_add_entry() to make

2014-01-05T18:40:06+00:00

static device mappings.

This SoC relied heavily on the fact that all devices were static-mapped
at a fixed address, and it (rather bogusly) used bus_space read and write
calls passing hard-coded virtual addresses instead of proper bus handles,
relying on the fact that the virtual addresses of the mappings were known
at compile time, and relying on the implementation details of arm
bus_space never changing.  All such usage was replaced with calls to
bus_space_map() to obtain a proper bus handle for the read/write calls.

This required adjusting some of the #define values that map out hardware
registers, and some of them were renamed in the process to make it clear
which were defining absolute physical addresses and which were defining
offsets.  (The ones that just define offsets don't appear to be referenced
and probably serve no value other than perhaps documentation.)

Merging of projects/armv6, part 8

2012-08-15T05:37:10+00:00

r235162:

  Initial LPC32x0 support. Includes DTS file for Embedded Artists EA3250
  board.

  Peripherals currently supported:
  - Serial ports
  - Interrupt controller
  - Timers
  - Ethernet
  - USB host
  - Framebuffer (in conjunction with SSD1289 LCD controller)
  - RTC
  - SPI
  - GPIO

Submitted by:	Jakub Wojciech Klama