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8250/16?50: Add support for Broadcom TruManage redirected serial port

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Add support for the UART device present in Broadcom TruManage capable
NetXtreme chips (ie: 5761m 5762, and 5725).

This implementation has a hidden transmit FIFO, so running in single-byte
interrupt mode results in too many interrupts.  The UART_CAP_HFIFO
capability was added to track this.  It continues to reload the THR as long
as the THRE and TSRE bits are set in the LSR up to a specified limit (1024
is used here).

Signed-off-by: Stephen Hurd <shurd@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stephen Hurd 2013-01-17 14:14:53 -08:00 • committed by Greg Kroah-Hartman
parent ded2f295a3
commit ebebd49a8e
4 changed files with 52 additions and 1 deletions
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3
include/uapi/linux/serial_core.h
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@ -50,7 +50,8 @@
#define PORT_LPC3220 22 /* NXP LPC32xx SoC "Standard" UART */
#define PORT_8250_CIR 23 /* CIR infrared port, has its own driver */
#define PORT_XR17V35X 24 /* Exar XR17V35x UARTs */
#define PORT_MAX_8250 24 /* max port ID */
#define PORT_BRCM_TRUMANAGE 24
#define PORT_MAX_8250 25 /* max port ID */
/*
* ARM specific type numbers. These are not currently guaranteed