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hsu: driver for Medfield High Speed UART device

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This is a PCI & UART driver, which suppors both PIO and DMA mode
UART operation. It has 3 identical UART ports and one internal
DMA controller.

Current FW will export 4 pci devices for hsu: 3 uart ports and 1
dma controller, each has one IRQ line. And we need to discuss the
device model, one PCI device covering whole HSU should be a better
model, but there is a problem of how to export the 4 IRQs info

Current driver set the highest baud rate to 2746800bps, which is
easy to scale down to 115200/230400.... To suport higher baud rate,
we need add special process, change DLAB/DLH/PS/DIV/MUL registers
all together.

921600 is the highest baud rate that has been tested with Bluetooth
modem connected to HSU port 0. Will test more when there is right
BT firmware.

Current version contains several work around for A0's Silicon bugs

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Feng Tang
2010-07-27 08:20:22 +01:00
committed by Greg Kroah-Hartman
parent 464eb8f596
commit d843fc6e9d
6 changed files with 1564 additions and 0 deletions
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2
include/linux/serial_core.h
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@@ -189,6 +189,8 @@
/* MAX3107 */
#define PORT_MAX3107 94
/* High Speed UART for Medfield */
#define PORT_MFD 95
#ifdef __KERNEL__