/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* arch/arm/mach-pxa/include/mach/uncompress.h
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*
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* Author: Nicolas Pitre
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* Copyright: (C) 2001 MontaVista Software Inc.
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*/
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#include <linux/serial_reg.h>
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#include <asm/mach-types.h>
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#define FFUART_BASE (0x40100000)
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#define BTUART_BASE (0x40200000)
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#define STUART_BASE (0x40700000)
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unsigned long uart_base;
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unsigned int uart_shift;
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unsigned int uart_is_pxa;
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static inline unsigned char uart_read(int offset)
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{
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return *(volatile unsigned char *)(uart_base + (offset << uart_shift));
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}
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static inline void uart_write(unsigned char val, int offset)
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{
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*(volatile unsigned char *)(uart_base + (offset << uart_shift)) = val;
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}
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static inline int uart_is_enabled(void)
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{
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/* assume enabled by default for non-PXA uarts */
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return uart_is_pxa ? uart_read(UART_IER) & UART_IER_UUE : 1;
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}
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static inline void putc(char c)
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{
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if (!uart_is_enabled())
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return;
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while (!(uart_read(UART_LSR) & UART_LSR_THRE))
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barrier();
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uart_write(c, UART_TX);
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}
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/*
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* This does not append a newline
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*/
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static inline void flush(void)
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{
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}
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static inline void arch_decomp_setup(void)
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{
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/* initialize to default */
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uart_base = FFUART_BASE;
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uart_shift = 2;
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uart_is_pxa = 1;
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if (machine_is_littleton() || machine_is_intelmote2()
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|| machine_is_csb726() || machine_is_stargate2()
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|| machine_is_cm_x300() || machine_is_balloon3())
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uart_base = STUART_BASE;
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if (machine_is_arcom_zeus()) {
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uart_base = 0x10000000; /* nCS4 */
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uart_shift = 1;
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uart_is_pxa = 0;
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}
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}
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