atmel_usart: change register access to C structure
This patch introduces C structure definition for register footprint of atmel's
usart.
Signed-off-by: Andreas Bießmann <biessmann@corscience.de>
diff --git a/drivers/serial/atmel_usart.h b/drivers/serial/atmel_usart.h
index af3773a..7cfc2d5 100644
--- a/drivers/serial/atmel_usart.h
+++ b/drivers/serial/atmel_usart.h
@@ -3,6 +3,9 @@
*
* Copyright (C) 2005-2006 Atmel Corporation
*
+ * Modified to support C structure SoC access by
+ * Andreas Bießmann <biessmann@corscience.de>
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
@@ -20,32 +23,27 @@
#ifndef __DRIVERS_ATMEL_USART_H__
#define __DRIVERS_ATMEL_USART_H__
-/* USART3 register offsets */
-#define USART3_CR 0x0000
-#define USART3_MR 0x0004
-#define USART3_IER 0x0008
-#define USART3_IDR 0x000c
-#define USART3_IMR 0x0010
-#define USART3_CSR 0x0014
-#define USART3_RHR 0x0018
-#define USART3_THR 0x001c
-#define USART3_BRGR 0x0020
-#define USART3_RTOR 0x0024
-#define USART3_TTGR 0x0028
-#define USART3_FIDI 0x0040
-#define USART3_NER 0x0044
-#define USART3_XXR 0x0048
-#define USART3_IFR 0x004c
-#define USART3_RPR 0x0100
-#define USART3_RCR 0x0104
-#define USART3_TPR 0x0108
-#define USART3_TCR 0x010c
-#define USART3_RNPR 0x0110
-#define USART3_RNCR 0x0114
-#define USART3_TNPR 0x0118
-#define USART3_TNCR 0x011c
-#define USART3_PTCR 0x0120
-#define USART3_PTSR 0x0124
+/* USART3 register footprint */
+typedef struct atmel_usart3 {
+ u32 cr;
+ u32 mr;
+ u32 ier;
+ u32 idr;
+ u32 imr;
+ u32 csr;
+ u32 rhr;
+ u32 thr;
+ u32 brgr;
+ u32 rtor;
+ u32 ttgr;
+ u32 reserved0[5];
+ u32 fidi;
+ u32 ner;
+ u32 reserved1;
+ u32 ifr;
+ u32 man;
+ u32 reserved2[54]; // version and PDC not needed
+} atmel_usart3_t;
/* Bitfields in CR */
#define USART3_RSTRX_OFFSET 2
@@ -305,10 +303,4 @@
<< USART3_##name##_OFFSET)) \
| USART3_BF(name,value))
-/* Register access macros */
-#define usart3_readl(reg) \
- readl((void *)USART_BASE + USART3_##reg)
-#define usart3_writel(reg,value) \
- writel((value), (void *)USART_BASE + USART3_##reg)
-
#endif /* __DRIVERS_ATMEL_USART_H__ */