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authorZang Roy-r61911 <tie-fei.zang@freescale.com>2006-06-30 02:29:58 -0700
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-07-09 21:11:09 +0100
commit3be91ec7388bae3cf1bfb4febcee5ab6c65f409f (patch)
treecb2fa80f81321e0d1dda6e88ca95ade081064624 /drivers/serial/serial_core.c
parentc65b15cfd6b8b74c6f2b3635bf47ee661d351ef3 (diff)
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[SERIAL] 8250: add tsi108 serial support
The following patch gets rid of CONFIG_TSI108_BRIDGE. I add UPIO_TSI to handle IIR and IER register in serial_in and serial_out. (1) the reason to rewrite serial_in: TSI108 rev Z1 version ERRATA. Reading the UART's Interrupt Identification Register (IIR) clears the Transmit Holding Register Empty (THRE) and Transmit buffer Empty (TEMP) interrupts even if they are not enabled in the Interrupt Enable Register (IER). This leads to loss of the interrupts. Interrupts are not cleared when reading UART registers as 32-bit word. (2) the reason to rewrite serial_out: Check for UART_IER_UUE bit in the autoconfig routine. This section of autoconfig is excluded for Tsi108/109 because bits 7 and 6 are reserved for internal use. They are R/W bits. In addition to incorrect identification, changing these bits (from 00) will make Tsi108/109 UART non-functional. Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/serial/serial_core.c')
-rw-r--r--drivers/serial/serial_core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index d5f636f..80ef7d4 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -2036,6 +2036,7 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port)
case UPIO_MEM:
case UPIO_MEM32:
case UPIO_AU:
+ case UPIO_TSI:
snprintf(address, sizeof(address),
"MMIO 0x%lx", port->mapbase);
break;