thorpej ff7306cf44 * Add a new hwflag, COM_HW_NO_TXPRELOAD, which tells comstart() to ... not pre-load the chip's Tx buffer, but instead waits for the Tx Ready interrupt to transmit the first chunk of data. * On the IOP310, set COM_HW_NO_TXPRELOAD, rather than COM_HW_TXFIFO_DISABLE. This solves the "UART hangs" problem on the Npwr in a nicer way (i.e. we get to use the FIFO, whee). The COM_HW_NO_TXPRELOAD happens to match the Linux 16550 driver's Tx algorithm, and the "UART hang" was never observed on the Npwr running Linux. Eventually, we might want to eliminate the COM_HW_NO_TXPRELOAD, and simply always use its algorithm. But it should be tested on more 16x50 variants before we do that. Kudos to Valeriy Ushakov <uwe@netbsd.org> for pointing out this solution (which also happens to fix the stray UART interrupt issue on the Krups Javastation), and to Allen Briggs <briggs@netbsd.org> for experimenting with various methods of fixing this.		2002-04-12 19:32:30 +00:00
..
compile
conf	Use the bus_space_generic bus space ops.	2002-04-12 19:12:31 +00:00
dev	Convert ioctl code to use EPASSTHROUGH instead of -1 or ENOTTY for	2002-03-17 19:40:26 +00:00
evbarm	New interrupt framework for NetBSD/evbarm, and accompanying new	2002-01-30 03:59:39 +00:00
ifpga	Use the bus_space_generic bus space ops.	2002-04-12 19:12:31 +00:00
include	* Change all uses of KERNEL_SPACE_START to KERNEL_BASE.	2002-03-23 02:53:59 +00:00
integrator	Remove footbridge-specific stuff that will never apply on the Integrator.	2002-04-12 06:13:42 +00:00
iq80310	* Add a new hwflag, COM_HW_NO_TXPRELOAD, which tells comstart() to	2002-04-12 19:32:30 +00:00
iq80321	Use the bus_space_generic bus space ops.	2002-04-12 19:02:30 +00:00
stand	Lose -nbsd	2002-04-11 21:47:36 +00:00
Makefile