| /* 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; |
| } |
| } |