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/* AM3505/3517 UART4 */ 19#define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */ 20 21/* AM33XX serial port */ 22#define AM33XX_UART1_BASE 0x44E09000 23 24/* External port on Zoom2/3 */ 25#define ZOOM_UART_BASE 0x10000000 26#define ZOOM_UART_VIRT 0xfa400000 27 28#define OMAP_PORT_SHIFT 2 29#define ZOOM_PORT_SHIFT 1 30 31#define UART_OFFSET(addr) ((addr) & 0x00ffffff) 32 33 .pushsection .data 34omap_uart_phys: .word 0 35omap_uart_virt: .word 0 36omap_uart_lsr: .word 0 37 .popsection 38 39 .macro addruart, rp, rv, tmp 40 41 /* Use omap_uart_phys/virt if already configured */ 4210: adr \rp, 99f @ get effective addr of 99f 43 ldr \rv, [\rp] @ get absolute addr of 99f 44 sub \rv, \rv, \rp @ offset between the two 45 ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys 46 sub \tmp, \rp, \rv @ make it effective 47 ldr \rp, [\tmp, #0] @ omap_uart_phys 48 ldr \rv, [\tmp, #4] @ omap_uart_virt 49 cmp \rp, #0 @ is port configured? 50 cmpne \rv, #0 51 bne 100f @ already configured 52 53 /* Configure the UART offset from the phys/virt base */ 54#ifdef CONFIG_DEBUG_AM33XXUART1 55 ldr \rp, =AM33XX_UART1_BASE 56 and \rp, \rp, #0x00ffffff 57 b 97f 58#endif 59#ifdef CONFIG_DEBUG_ZOOM_UART 60 ldr \rp, =ZOOM_UART_BASE 61 str \rp, [\tmp, #0] @ omap_uart_phys 62 ldr \rp, =ZOOM_UART_VIRT 63 str \rp, [\tmp, #4] @ omap_uart_virt 64 mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT) 65 str \rp, [\tmp, #8] @ omap_uart_lsr 66#endif 67 b 10b 68 69 /* AM33XX: Store both phys and virt address for the uart */ 7097: add \rp, \rp, #0x44000000 @ phys base 71 str \rp, [\tmp, #0] @ omap_uart_phys 72 sub \rp, \rp, #0x44000000 @ phys base 73 add \rp, \rp, #0xf9000000 @ virt base 74 str \rp, [\tmp, #4] @ omap_uart_virt 75 mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) 76 str \rp, [\tmp, #8] @ omap_uart_lsr 77 78 b 10b 79 80 .align 8199: .word . 82 .word omap_uart_phys 83 .ltorg 84 85100: /* Pass the UART_LSR reg address */ 86 ldr \tmp, [\tmp, #8] @ omap_uart_lsr 87 add \rp, \rp, \tmp 88 add \rv, \rv, \tmp 89 .endm 90 91 .macro senduart,rd,rx 92 orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset 93 bic \rx, \rx, #0xff @ get base (THR) reg address 94 strb \rd, [\rx] @ send lower byte of rd 95 orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR) 96 bic \rd, \rd, #(0xff << 24) @ restore original rd 97 .endm 98 99 .macro busyuart,rd,rx 1001001: ldrb \rd, [\rx] @ rx contains UART_LSR address 101 and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) 102 teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) 103 bne 1001b 104 .endm 105 106 .macro waituart,rd,rx 107 .endm 108