src/sys/dev/uart/uart_dev_sab82532.c, branch release/12.3.0

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40Z

Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.

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

2015-04-11T17:16:23Z

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

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

2014-01-19T19:39:13Z

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)

Fix low-level uart drivers that set their fifo sizes in the softc too late.

2013-04-01T00:44:20Z

uart(4) allocates send and receiver buffers in attach() before it calls the low-level driver's attach routine. Many low-level drivers set the fifo sizes in their attach routine, which is too late. Other drivers set them in the probe() routine, so that they're available when uart(4) allocates buffers. This fixes the ones that were setting the values too late by moving the code to probe().

Don't expose the uart_ops structure directly, but instead have

2007-04-02T22:00:22Z

it obtained through the uart_class structure. This allows us to declare the uart_class structure as weak and as such allows us to reference it even when it's not compiled-in. It also allows is to get the uart_ops structure by name, which makes it possible to implement the dt tag handling in uart_getenv(). The side-effect of all this is that we're using the uart_class structure more consistently which means that we now also have access to the size of the bus space block needed by the hardware when we map the bus space, eliminating any hardcoding.

- Add a uart_rxready() and corresponding device-specific implementations

2007-01-18T22:01:19Z

that can be used to check whether receive data is ready, i.e. whether the subsequent call of uart_poll() should return a char, and unlike uart_poll() doesn't actually receive data. - Remove the device-specific implementations of uart_poll() and implement uart_poll() in terms of uart_getc() and the newly added uart_rxready() in order to minimize code duplication. - In sunkbd(4) take advantage of uart_rxready() and use it to implement the polled mode part of sunkbd_check() so we don't need to buffer a potentially read char in the softc. - Fix some mis-indentation in sunkbd_read_char(). Discussed with: marcel

Don't hold the hardware mutex across getc(). It can wait indefinitely

2006-04-01T19:04:54Z

for a character to be received. Instead let getc() do any necesary locking.

Add support for scc(4).

2006-03-30T18:37:03Z

Replace our local UART_SIGMASK_* with the global SER_MASK_*.

2006-02-24T05:40:17Z

MFp4:

2006-02-24T02:42:26Z

Stop using our local UART_IPEND_* and instead use the global SER_INT_* as defined in .