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authorRussell King <rmk+kernel@arm.linux.org.uk>2015-11-16 17:40:57 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-12-13 19:59:48 -0800
commit7ec758718920e5e5876d0d02ece6855128c8eb1e (patch)
treeecdc049d7a296b75b1fe7f0da731bf8c875fc8c4 /include/linux/amba
parent84c3e03bdd1146191b7222ed62a08512199a45c7 (diff)
downloadop-kernel-dev-7ec758718920e5e5876d0d02ece6855128c8eb1e.zip
op-kernel-dev-7ec758718920e5e5876d0d02ece6855128c8eb1e.tar.gz
tty: amba-pl011: add support for ZTE UART (EXPERIMENTAL)
Add (incomplete) support for the ZTE UART to the AMBA PL011 driver. This is similar to the ARM and ST variants, except it has a different register address layout, and requires 32-bit accesses to the registers. Use the newly introduced register tables and access size support to cope with these differences. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/amba')
-rw-r--r--include/linux/amba/serial.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/amba/serial.h b/include/linux/amba/serial.h
index 0ddb5c0..d76a19b 100644
--- a/include/linux/amba/serial.h
+++ b/include/linux/amba/serial.h
@@ -65,6 +65,24 @@
#define ST_UART011_ABCR 0x100 /* Autobaud control register. */
#define ST_UART011_ABIMSC 0x15C /* Autobaud interrupt mask/clear register. */
+/*
+ * ZTE UART register offsets. This UART has a radically different address
+ * allocation from the ARM and ST variants, so we list all registers here.
+ * We assume unlisted registers do not exist.
+ */
+#define ZX_UART011_DR 0x04
+#define ZX_UART011_FR 0x14
+#define ZX_UART011_IBRD 0x24
+#define ZX_UART011_FBRD 0x28
+#define ZX_UART011_LCRH 0x30
+#define ZX_UART011_CR 0x34
+#define ZX_UART011_IFLS 0x38
+#define ZX_UART011_IMSC 0x40
+#define ZX_UART011_RIS 0x44
+#define ZX_UART011_MIS 0x48
+#define ZX_UART011_ICR 0x4c
+#define ZX_UART011_DMACR 0x50
+
#define UART011_DR_OE (1 << 11)
#define UART011_DR_BE (1 << 10)
#define UART011_DR_PE (1 << 9)
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