71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* arch/arm/mach-pxa/include/mach/uncompress.h
|
||
|
|
*
|
||
|
|
* Author: Nicolas Pitre
|
||
|
|
* Copyright: (C) 2001 MontaVista Software Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/serial_reg.h>
|
||
|
|
#include <asm/mach-types.h>
|
||
|
|
|
||
|
|
#define FFUART_BASE (0x40100000)
|
||
|
|
#define BTUART_BASE (0x40200000)
|
||
|
|
#define STUART_BASE (0x40700000)
|
||
|
|
|
||
|
|
unsigned long uart_base;
|
||
|
|
unsigned int uart_shift;
|
||
|
|
unsigned int uart_is_pxa;
|
||
|
|
|
||
|
|
static inline unsigned char uart_read(int offset)
|
||
|
|
{
|
||
|
|
return *(volatile unsigned char *)(uart_base + (offset << uart_shift));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void uart_write(unsigned char val, int offset)
|
||
|
|
{
|
||
|
|
*(volatile unsigned char *)(uart_base + (offset << uart_shift)) = val;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int uart_is_enabled(void)
|
||
|
|
{
|
||
|
|
/* assume enabled by default for non-PXA uarts */
|
||
|
|
return uart_is_pxa ? uart_read(UART_IER) & UART_IER_UUE : 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void putc(char c)
|
||
|
|
{
|
||
|
|
if (!uart_is_enabled())
|
||
|
|
return;
|
||
|
|
|
||
|
|
while (!(uart_read(UART_LSR) & UART_LSR_THRE))
|
||
|
|
barrier();
|
||
|
|
|
||
|
|
uart_write(c, UART_TX);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This does not append a newline
|
||
|
|
*/
|
||
|
|
static inline void flush(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void arch_decomp_setup(void)
|
||
|
|
{
|
||
|
|
/* initialize to default */
|
||
|
|
uart_base = FFUART_BASE;
|
||
|
|
uart_shift = 2;
|
||
|
|
uart_is_pxa = 1;
|
||
|
|
|
||
|
|
if (machine_is_littleton() || machine_is_csb726() ||
|
||
|
|
machine_is_cm_x300() || machine_is_balloon3())
|
||
|
|
uart_base = STUART_BASE;
|
||
|
|
|
||
|
|
if (machine_is_arcom_zeus()) {
|
||
|
|
uart_base = 0x10000000; /* nCS4 */
|
||
|
|
uart_shift = 1;
|
||
|
|
uart_is_pxa = 0;
|
||
|
|
}
|
||
|
|
}
|