src-test2/sys/dev/uart/uart_dev_ns8250.c, branch release/10.0.0

A final test with unmodified code has shown that a delay of 150ms

2013-08-30T15:26:45Z

is not giving us a 100% success rate. Bump the delay to 200ms as that seems to do the trick. Note that during testing the delay was added to uart_bus_attach() in uart_core.c. While having the delay in a different place can change the behaviour, it was not expected. Having to bump the delay with another 50ms could therefore be an indication that the problem can not be solved with delays. Reported by: kevlo@ Tested by: kevlo@

Work-around a timing problem with the ITE IT8513E now that the core

2013-08-29T16:26:04Z

calls ns8250_bus_ipend() almost immediately after ns8250_bus_attach(). As it appears, a line break condition is being signalled for almost all received characters due to this. A delay of 150ms seems enough to allow the H/W to settle and to avoid the problem. More analysis is needed, but for now a regression has been addressed. Reported by: kevlo@ Tested by: kevlo@

Make the uart ns8250 high-level interface public rather than static.

2013-08-21T14:26:15Z

This makes it easier to implement new drivers which are "mostly ns8250" but with some small difference such as needing to enable clocks or poke a non-standard register at probe or attach time.

Add support for A10 uart.

2013-03-01T01:42:31Z

A10 uart is derived from Synopsys DesignWare uart and requires to read Uart Status Register when IIR_BUSY has detected. Also this change includes FDT check, where it checks device specific properties defined in dts and sets the busy_detect variable. broken_txfifo is also needed to be set in order to make it work for A10 uart case. Reviewed by: marcel@ Approved by: gonzo@

Add a loader tunable "hw.broken_txfifo" which enables a workaround for a

2013-01-27T23:33:42Z

bug in old versions of QEMU (and Xen, and other places using QEMU code). On those buggy emulated UARTs, the "TX idle" interrupt gets lost; with this workaround, we spinwait for the TX to happen and then send ourselves the interrupt. It's ugly but it works, while minimizing the impact on the code for the !broken_txfifo case. MFC after: 2 weeks

Disable the TX ready interrupts once we received one, some UART won't clear

2011-11-02T20:45:44Z

the IIR_TXRDY bit upon reading. Reviewed by: marcel

Ignore MCR[6] during the probe to fix a false negative. Bit 6 of the

2011-05-26T17:02:56Z

MCR register on the Sunix Sun1699 chip tends to be set but doesn't seem to have a function. That is, FreeBSD just works (provided the correct RCLK is used) regardless. PR: kern/129663 Diagnostics: Eygene Ryabinkin MFC after: 3 days

Fix typos - remove duplicate "the".

2011-02-21T09:01:34Z

PR: bin/154928 Submitted by: Eitan Adler MFC after: 3 days

Remove redundant checking of sc_leaving (uart_intr() already handles this).

2010-05-02T19:07:19Z

Approved by: marcel

Fix hangs caused by hardware that signals receive errors

2009-04-08T00:14:06Z

(framing, parity, etc), but does not indicate characters being received. Since no chracters have been received, ignore the line errors. PR: 131006 MFC after: 3 days