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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 /include/linux
parentc65b15cfd6b8b74c6f2b3635bf47ee661d351ef3 (diff)
[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 'include/linux')
-rw-r--r--include/linux/serial_core.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 058cba70818..86501a3de2a 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -227,6 +227,7 @@ struct uart_port {
#define UPIO_MEM (2)
#define UPIO_MEM32 (3)
#define UPIO_AU (4) /* Au1x00 type IO */
+#define UPIO_TSI (5) /* Tsi108/109 type IO */
unsigned int read_status_mask; /* driver specific */
unsigned int ignore_status_mask; /* driver specific */