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>
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)