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/* 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_intelmote2()
|| machine_is_csb726() || machine_is_stargate2()
|| 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;
}
}