1/* 2 * Serial port stubs for kernel decompress status messages 3 * 4 * Initially based on: 5 * arch/arm/plat-omap/include/mach/uncompress.h 6 * 7 * Original copyrights follow. 8 * 9 * Copyright (C) 2000 RidgeRun, Inc. 10 * Author: Greg Lonnon <glonnon@ridgerun.com> 11 * 12 * Rewritten by: 13 * Author: <source@mvista.com> 14 * 2004 (c) MontaVista Software, Inc. 15 * 16 * This file is licensed under the terms of the GNU General Public License 17 * version 2. This program is licensed "as is" without any warranty of any 18 * kind, whether express or implied. 19 */ 20 21#include <linux/types.h> 22#include <linux/serial_reg.h> 23 24#include <asm/mach-types.h> 25 26#include <mach/serial.h> 27 28static u32 *uart; 29static u32 *uart_info = (u32 *)(DAVINCI_UART_INFO); 30 31/* PORT_16C550A, in polled non-fifo mode */ 32static void putc(char c) 33{ 34 while (!(uart[UART_LSR] & UART_LSR_THRE)) 35 barrier(); 36 uart[UART_TX] = c; 37} 38 39static inline void flush(void) 40{ 41 while (!(uart[UART_LSR] & UART_LSR_THRE)) 42 barrier(); 43} 44 45static inline void set_uart_info(u32 phys, void * __iomem virt) 46{ 47 uart = (u32 *)phys; 48 uart_info[0] = phys; 49 uart_info[1] = (u32)virt; 50} 51 52#define _DEBUG_LL_ENTRY(machine, phys, virt) \ 53 if (machine_is_##machine()) { \ 54 set_uart_info(phys, virt); \ 55 break; \ 56 } 57 58#define DEBUG_LL_DAVINCI(machine, port) \ 59 _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE, \ 60 IO_ADDRESS(DAVINCI_UART##port##_BASE)) 61 62#define DEBUG_LL_DA8XX(machine, port) \ 63 _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE, \ 64 IO_ADDRESS(DA8XX_UART##port##_BASE)) 65 66#define DEBUG_LL_TNETV107X(machine, port) \ 67 _DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE, \ 68 TNETV107X_UART##port##_VIRT) 69 70static inline void __arch_decomp_setup(unsigned long arch_id) 71{ 72 /* 73 * Initialize the port based on the machine ID from the bootloader. 74 * Note that we're using macros here instead of switch statement 75 * as machine_is functions are optimized out for the boards that 76 * are not selected. 77 */ 78 do { 79 /* Davinci boards */ 80 DEBUG_LL_DAVINCI(davinci_evm, 0); 81 DEBUG_LL_DAVINCI(sffsdr, 0); 82 DEBUG_LL_DAVINCI(neuros_osd2, 0); 83 DEBUG_LL_DAVINCI(davinci_dm355_evm, 0); 84 DEBUG_LL_DAVINCI(dm355_leopard, 0); 85 DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0); 86 DEBUG_LL_DAVINCI(davinci_dm365_evm, 0); 87 88 /* DA8xx boards */ 89 DEBUG_LL_DA8XX(davinci_da830_evm, 2); 90 DEBUG_LL_DA8XX(davinci_da850_evm, 2); 91 92 /* TNETV107x boards */ 93 DEBUG_LL_TNETV107X(tnetv107x, 1); 94 } while (0); 95} 96 97#define arch_decomp_setup() __arch_decomp_setup(arch_id) 98#define arch_decomp_wdog() 99