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.c b/drivers/serial/atmel_usart.c
index cad3412..bfa1f3a 100644
--- a/drivers/serial/atmel_usart.c
+++ b/drivers/serial/atmel_usart.c
@@ -1,6 +1,9 @@
/*
* Copyright (C) 2004-2006 Atmel Corporation
*
+ * Modified to support C structur 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
@@ -16,10 +19,6 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <common.h>
-#ifndef CONFIG_AT91_LEGACY
-#define CONFIG_AT91_LEGACY
-#warning Please update to use C structur SoC access !
-#endif
#include <watchdog.h>
#include <asm/io.h>
@@ -46,6 +45,7 @@
void serial_setbrg(void)
{
+ atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
unsigned long divisor;
unsigned long usart_hz;
@@ -56,32 +56,37 @@
*/
usart_hz = get_usart_clk_rate(USART_ID);
divisor = (usart_hz / 16 + gd->baudrate / 2) / gd->baudrate;
- usart3_writel(BRGR, USART3_BF(CD, divisor));
+ writel(USART3_BF(CD, divisor), &usart->brgr);
}
int serial_init(void)
{
- usart3_writel(CR, USART3_BIT(RSTRX) | USART3_BIT(RSTTX));
+ atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+
+ writel(USART3_BIT(RSTRX) | USART3_BIT(RSTTX), &usart->cr);
serial_setbrg();
- usart3_writel(CR, USART3_BIT(RXEN) | USART3_BIT(TXEN));
- usart3_writel(MR, (USART3_BF(USART_MODE, USART3_USART_MODE_NORMAL)
+ writel(USART3_BIT(RXEN) | USART3_BIT(TXEN), &usart->cr);
+ writel((USART3_BF(USART_MODE, USART3_USART_MODE_NORMAL)
| USART3_BF(USCLKS, USART3_USCLKS_MCK)
| USART3_BF(CHRL, USART3_CHRL_8)
| USART3_BF(PAR, USART3_PAR_NONE)
- | USART3_BF(NBSTOP, USART3_NBSTOP_1)));
+ | USART3_BF(NBSTOP, USART3_NBSTOP_1)),
+ &usart->mr);
return 0;
}
void serial_putc(char c)
{
+ atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+
if (c == '\n')
serial_putc('\r');
- while (!(usart3_readl(CSR) & USART3_BIT(TXRDY))) ;
- usart3_writel(THR, c);
+ while (!(readl(&usart->csr) & USART3_BIT(TXRDY)));
+ writel(c, &usart->thr);
}
void serial_puts(const char *s)
@@ -92,12 +97,15 @@
int serial_getc(void)
{
- while (!(usart3_readl(CSR) & USART3_BIT(RXRDY)))
+ atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+
+ while (!(readl(&usart->csr) & USART3_BIT(RXRDY)))
WATCHDOG_RESET();
- return usart3_readl(RHR);
+ return readl(&usart->rhr);
}
int serial_tstc(void)
{
- return (usart3_readl(CSR) & USART3_BIT(RXRDY)) != 0;
+ atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+ return (readl(&usart->csr) & USART3_BIT(RXRDY)) != 0;
}