1/* 2 * Debugging macro include header 3 * 4 * Copyright (C) 1994-1999 Russell King 5 * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks 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 13#include <linux/serial_reg.h> 14 15/* OMAP3 serial ports */ 16#define OMAP3_UART4_AM35XX_BASE 0x4809E000 /* Only on AM35xx */ 17 18/* TI81XX serial ports */ 19#define TI81XX_UART1_BASE 0x48020000 20#define TI81XX_UART2_BASE 0x48022000 21#define TI81XX_UART3_BASE 0x48024000 22 23/* AM3505/3517 UART4 */ 24#define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */ 25 26/* AM33XX serial port */ 27#define AM33XX_UART1_BASE 0x44E09000 28 29/* External port on Zoom2/3 */ 30#define ZOOM_UART_BASE 0x10000000 31#define ZOOM_UART_VIRT 0xfa400000 32 33#define OMAP_PORT_SHIFT 2 34#define ZOOM_PORT_SHIFT 1 35 36#define UART_OFFSET(addr) ((addr) & 0x00ffffff) 37 38 .pushsection .data 39omap_uart_phys: .word 0 40omap_uart_virt: .word 0 41omap_uart_lsr: .word 0 42 .popsection 43 44 .macro addruart, rp, rv, tmp 45 46 /* Use omap_uart_phys/virt if already configured */ 4710: adr \rp, 99f @ get effective addr of 99f 48 ldr \rv, [\rp] @ get absolute addr of 99f 49 sub \rv, \rv, \rp @ offset between the two 50 ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys 51 sub \tmp, \rp, \rv @ make it effective 52 ldr \rp, [\tmp, #0] @ omap_uart_phys 53 ldr \rv, [\tmp, #4] @ omap_uart_virt 54 cmp \rp, #0 @ is port configured? 55 cmpne \rv, #0 56 bne 100f @ already configured 57 58 /* Configure the UART offset from the phys/virt base */ 59#ifdef CONFIG_DEBUG_TI81XXUART1 60 mov \rp, #UART_OFFSET(TI81XX_UART1_BASE) 61 b 98f 62#endif 63#ifdef CONFIG_DEBUG_TI81XXUART2 64 mov \rp, #UART_OFFSET(TI81XX_UART2_BASE) 65 b 98f 66#endif 67#ifdef CONFIG_DEBUG_TI81XXUART3 68 mov \rp, #UART_OFFSET(TI81XX_UART3_BASE) 69 b 98f 70#endif 71#ifdef CONFIG_DEBUG_AM33XXUART1 72 ldr \rp, =AM33XX_UART1_BASE 73 and \rp, \rp, #0x00ffffff 74 b 97f 75#endif 76#ifdef CONFIG_DEBUG_ZOOM_UART 77 ldr \rp, =ZOOM_UART_BASE 78 str \rp, [\tmp, #0] @ omap_uart_phys 79 ldr \rp, =ZOOM_UART_VIRT 80 str \rp, [\tmp, #4] @ omap_uart_virt 81 mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT) 82 str \rp, [\tmp, #8] @ omap_uart_lsr 83#endif 84 b 10b 85 86 /* AM33XX: Store both phys and virt address for the uart */ 8797: add \rp, \rp, #0x44000000 @ phys base 88 str \rp, [\tmp, #0] @ omap_uart_phys 89 sub \rp, \rp, #0x44000000 @ phys base 90 add \rp, \rp, #0xf9000000 @ virt base 91 str \rp, [\tmp, #4] @ omap_uart_virt 92 mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) 93 str \rp, [\tmp, #8] @ omap_uart_lsr 94 95 b 10b 96 97 /* Store both phys and virt address for the uart */ 9898: add \rp, \rp, #0x48000000 @ phys base 99 str \rp, [\tmp, #0] @ omap_uart_phys 100 sub \rp, \rp, #0x48000000 @ phys base 101 add \rp, \rp, #0xfa000000 @ virt base 102 str \rp, [\tmp, #4] @ omap_uart_virt 103 mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) 104 str \rp, [\tmp, #8] @ omap_uart_lsr 105 106 b 10b 107 108 .align 10999: .word . 110 .word omap_uart_phys 111 .ltorg 112 113100: /* Pass the UART_LSR reg address */ 114 ldr \tmp, [\tmp, #8] @ omap_uart_lsr 115 add \rp, \rp, \tmp 116 add \rv, \rv, \tmp 117 .endm 118 119 .macro senduart,rd,rx 120 orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset 121 bic \rx, \rx, #0xff @ get base (THR) reg address 122 strb \rd, [\rx] @ send lower byte of rd 123 orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR) 124 bic \rd, \rd, #(0xff << 24) @ restore original rd 125 .endm 126 127 .macro busyuart,rd,rx 1281001: ldrb \rd, [\rx] @ rx contains UART_LSR address 129 and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) 130 teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) 131 bne 1001b 132 .endm 133 134 .macro waituart,rd,rx 135 .endm 136