1/* 2 * arch/arm/mach-pxa/include/mach/uncompress.h 3 * 4 * Author: Nicolas Pitre 5 * Copyright: (C) 2001 MontaVista Software Inc. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12#include <linux/serial_reg.h> 13#include <asm/mach-types.h> 14 15#define FFUART_BASE (0x40100000) 16#define BTUART_BASE (0x40200000) 17#define STUART_BASE (0x40700000) 18 19unsigned long uart_base; 20unsigned int uart_shift; 21unsigned int uart_is_pxa; 22 23static inline unsigned char uart_read(int offset) 24{ 25 return *(volatile unsigned char *)(uart_base + (offset << uart_shift)); 26} 27 28static inline void uart_write(unsigned char val, int offset) 29{ 30 *(volatile unsigned char *)(uart_base + (offset << uart_shift)) = val; 31} 32 33static inline int uart_is_enabled(void) 34{ 35 /* assume enabled by default for non-PXA uarts */ 36 return uart_is_pxa ? uart_read(UART_IER) & UART_IER_UUE : 1; 37} 38 39static inline void putc(char c) 40{ 41 if (!uart_is_enabled()) 42 return; 43 44 while (!(uart_read(UART_LSR) & UART_LSR_THRE)) 45 barrier(); 46 47 uart_write(c, UART_TX); 48} 49 50/* 51 * This does not append a newline 52 */ 53static inline void flush(void) 54{ 55} 56 57static inline void arch_decomp_setup(void) 58{ 59 /* initialize to default */ 60 uart_base = FFUART_BASE; 61 uart_shift = 2; 62 uart_is_pxa = 1; 63 64 if (machine_is_littleton() || machine_is_intelmote2() 65 || machine_is_csb726() || machine_is_stargate2() 66 || machine_is_cm_x300() || machine_is_balloon3()) 67 uart_base = STUART_BASE; 68 69 if (machine_is_arcom_zeus()) { 70 uart_base = 0x10000000; /* nCS4 */ 71 uart_shift = 1; 72 uart_is_pxa = 0; 73 } 74} 75