Tony Lindgren | aca59b8 | 2009-10-19 17:26:17 -0700 | [diff] [blame] | 1 | /* arch/arm/mach-omap2/include/mach/debug-macro.S |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 2 | * |
| 3 | * Debugging macro include header |
| 4 | * |
| 5 | * Copyright (C) 1994-1999 Russell King |
| 6 | * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | */ |
| 13 | |
Tony Lindgren | 4f2c49f | 2010-02-15 08:48:53 -0800 | [diff] [blame] | 14 | #include <linux/serial_reg.h> |
| 15 | |
Tony Lindgren | 2c0b495 | 2012-10-31 14:57:06 -0700 | [diff] [blame^] | 16 | #include <mach/serial.h> |
Tony Lindgren | 4f2c49f | 2010-02-15 08:48:53 -0800 | [diff] [blame] | 17 | |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 18 | #define UART_OFFSET(addr) ((addr) & 0x00ffffff) |
| 19 | |
| 20 | .pushsection .data |
| 21 | omap_uart_phys: .word 0 |
| 22 | omap_uart_virt: .word 0 |
| 23 | omap_uart_lsr: .word 0 |
| 24 | .popsection |
| 25 | |
| 26 | /* |
| 27 | * Note that this code won't work if the bootloader passes |
| 28 | * a wrong machine ID number in r1. To debug, just hardcode |
| 29 | * the desired UART phys and virt addresses temporarily into |
| 30 | * the omap_uart_phys and omap_uart_virt above. |
| 31 | */ |
Nicolas Pitre | 639da5e | 2011-08-31 22:55:46 -0400 | [diff] [blame] | 32 | .macro addruart, rp, rv, tmp |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 33 | |
| 34 | /* Use omap_uart_phys/virt if already configured */ |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 35 | 10: adr \rp, 99f @ get effective addr of 99f |
| 36 | ldr \rv, [\rp] @ get absolute addr of 99f |
| 37 | sub \rv, \rv, \rp @ offset between the two |
| 38 | ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys |
| 39 | sub \tmp, \rp, \rv @ make it effective |
| 40 | ldr \rp, [\tmp, #0] @ omap_uart_phys |
| 41 | ldr \rv, [\tmp, #4] @ omap_uart_virt |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 42 | cmp \rp, #0 @ is port configured? |
| 43 | cmpne \rv, #0 |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 44 | bne 100f @ already configured |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 45 | |
Tony Lindgren | 96554d7 | 2010-04-30 17:39:19 -0700 | [diff] [blame] | 46 | /* Check the debug UART configuration set in uncompress.h */ |
Nicolas Pitre | dd185456 | 2011-08-31 13:57:37 -0400 | [diff] [blame] | 47 | mov \rp, pc |
| 48 | ldr \rv, =OMAP_UART_INFO_OFS |
| 49 | and \rp, \rp, #0xff000000 |
| 50 | ldr \rp, [\rp, \rv] |
Syed Mohammed, Khasim | cc26b3b | 2008-10-09 17:51:41 +0300 | [diff] [blame] | 51 | |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 52 | /* Select the UART to use based on the UART1 scratchpad value */ |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 53 | cmp \rp, #0 @ no port configured? |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 54 | beq 21f @ if none, try to use UART1 |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 55 | cmp \rp, #OMAP2UART1 @ OMAP2/3/4UART1 |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 56 | beq 21f @ configure OMAP2/3/4UART1 |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 57 | cmp \rp, #OMAP2UART2 @ OMAP2/3/4UART2 |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 58 | beq 22f @ configure OMAP2/3/4UART2 |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 59 | cmp \rp, #OMAP2UART3 @ only on 24xx |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 60 | beq 23f @ configure OMAP2UART3 |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 61 | cmp \rp, #OMAP3UART3 @ only on 34xx |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 62 | beq 33f @ configure OMAP3UART3 |
R Sricharan | 05e152c | 2012-06-05 16:21:32 +0530 | [diff] [blame] | 63 | cmp \rp, #OMAP4UART3 @ only on 44xx/54xx |
| 64 | beq 43f @ configure OMAP4/5UART3 |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 65 | cmp \rp, #OMAP3UART4 @ only on 36xx |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 66 | beq 34f @ configure OMAP3UART4 |
R Sricharan | 05e152c | 2012-06-05 16:21:32 +0530 | [diff] [blame] | 67 | cmp \rp, #OMAP4UART4 @ only on 44xx/54xx |
| 68 | beq 44f @ configure OMAP4/5UART4 |
Hemant Pedanekar | a920360 | 2011-12-13 10:46:44 -0800 | [diff] [blame] | 69 | cmp \rp, #TI81XXUART1 @ ti81Xx UART offsets different |
Hemant Pedanekar | 4d887a2 | 2011-02-15 23:06:17 +0530 | [diff] [blame] | 70 | beq 81f @ configure UART1 |
Hemant Pedanekar | a920360 | 2011-12-13 10:46:44 -0800 | [diff] [blame] | 71 | cmp \rp, #TI81XXUART2 @ ti81Xx UART offsets different |
Hemant Pedanekar | 4d887a2 | 2011-02-15 23:06:17 +0530 | [diff] [blame] | 72 | beq 82f @ configure UART2 |
Hemant Pedanekar | a920360 | 2011-12-13 10:46:44 -0800 | [diff] [blame] | 73 | cmp \rp, #TI81XXUART3 @ ti81Xx UART offsets different |
Hemant Pedanekar | 4d887a2 | 2011-02-15 23:06:17 +0530 | [diff] [blame] | 74 | beq 83f @ configure UART3 |
Afzal Mohammed | d0a9001 | 2012-05-10 14:23:01 +0530 | [diff] [blame] | 75 | cmp \rp, #AM33XXUART1 @ AM33XX UART offsets different |
| 76 | beq 84f @ configure UART1 |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 77 | cmp \rp, #ZOOM_UART @ only on zoom2/3 |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 78 | beq 95f @ configure ZOOM_UART |
| 79 | |
| 80 | /* Configure the UART offset from the phys/virt base */ |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 81 | 21: mov \rp, #UART_OFFSET(OMAP2_UART1_BASE) @ omap2/3/4 |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 82 | b 98f |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 83 | 22: mov \rp, #UART_OFFSET(OMAP2_UART2_BASE) @ omap2/3/4 |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 84 | b 98f |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 85 | 23: mov \rp, #UART_OFFSET(OMAP2_UART3_BASE) |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 86 | b 98f |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 87 | 33: mov \rp, #UART_OFFSET(OMAP3_UART1_BASE) |
| 88 | add \rp, \rp, #0x00fb0000 |
| 89 | add \rp, \rp, #0x00006000 @ OMAP3_UART3_BASE |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 90 | b 98f |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 91 | 34: mov \rp, #UART_OFFSET(OMAP3_UART1_BASE) |
| 92 | add \rp, \rp, #0x00fb0000 |
| 93 | add \rp, \rp, #0x00028000 @ OMAP3_UART4_BASE |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 94 | b 98f |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 95 | 43: mov \rp, #UART_OFFSET(OMAP4_UART3_BASE) |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 96 | b 98f |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 97 | 44: mov \rp, #UART_OFFSET(OMAP4_UART4_BASE) |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 98 | b 98f |
Hemant Pedanekar | a920360 | 2011-12-13 10:46:44 -0800 | [diff] [blame] | 99 | 81: mov \rp, #UART_OFFSET(TI81XX_UART1_BASE) |
Hemant Pedanekar | 4d887a2 | 2011-02-15 23:06:17 +0530 | [diff] [blame] | 100 | b 98f |
Hemant Pedanekar | a920360 | 2011-12-13 10:46:44 -0800 | [diff] [blame] | 101 | 82: mov \rp, #UART_OFFSET(TI81XX_UART2_BASE) |
Hemant Pedanekar | 4d887a2 | 2011-02-15 23:06:17 +0530 | [diff] [blame] | 102 | b 98f |
Hemant Pedanekar | a920360 | 2011-12-13 10:46:44 -0800 | [diff] [blame] | 103 | 83: mov \rp, #UART_OFFSET(TI81XX_UART3_BASE) |
Hemant Pedanekar | 4d887a2 | 2011-02-15 23:06:17 +0530 | [diff] [blame] | 104 | b 98f |
Afzal Mohammed | d0a9001 | 2012-05-10 14:23:01 +0530 | [diff] [blame] | 105 | 84: ldr \rp, =AM33XX_UART1_BASE |
| 106 | and \rp, \rp, #0x00ffffff |
| 107 | b 97f |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 108 | 95: ldr \rp, =ZOOM_UART_BASE |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 109 | str \rp, [\tmp, #0] @ omap_uart_phys |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 110 | ldr \rp, =ZOOM_UART_VIRT |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 111 | str \rp, [\tmp, #4] @ omap_uart_virt |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 112 | mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT) |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 113 | str \rp, [\tmp, #8] @ omap_uart_lsr |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 114 | b 10b |
| 115 | |
Afzal Mohammed | d0a9001 | 2012-05-10 14:23:01 +0530 | [diff] [blame] | 116 | /* AM33XX: Store both phys and virt address for the uart */ |
| 117 | 97: add \rp, \rp, #0x44000000 @ phys base |
| 118 | str \rp, [\tmp, #0] @ omap_uart_phys |
| 119 | sub \rp, \rp, #0x44000000 @ phys base |
| 120 | add \rp, \rp, #0xf9000000 @ virt base |
| 121 | str \rp, [\tmp, #4] @ omap_uart_virt |
| 122 | mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) |
| 123 | str \rp, [\tmp, #8] @ omap_uart_lsr |
| 124 | |
| 125 | b 10b |
| 126 | |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 127 | /* Store both phys and virt address for the uart */ |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 128 | 98: add \rp, \rp, #0x48000000 @ phys base |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 129 | str \rp, [\tmp, #0] @ omap_uart_phys |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 130 | sub \rp, \rp, #0x48000000 @ phys base |
| 131 | add \rp, \rp, #0xfa000000 @ virt base |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 132 | str \rp, [\tmp, #4] @ omap_uart_virt |
Jeremy Kerr | 0ea1293 | 2010-07-06 18:30:06 +0800 | [diff] [blame] | 133 | mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 134 | str \rp, [\tmp, #8] @ omap_uart_lsr |
Tony Lindgren | 0c8219f | 2010-02-15 08:49:01 -0800 | [diff] [blame] | 135 | |
| 136 | b 10b |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 137 | |
| 138 | .align |
| 139 | 99: .word . |
| 140 | .word omap_uart_phys |
| 141 | .ltorg |
| 142 | |
| 143 | 100: /* Pass the UART_LSR reg address */ |
| 144 | ldr \tmp, [\tmp, #8] @ omap_uart_lsr |
| 145 | add \rp, \rp, \tmp |
| 146 | add \rv, \rv, \tmp |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 147 | .endm |
| 148 | |
| 149 | .macro senduart,rd,rx |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 150 | orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset |
| 151 | bic \rx, \rx, #0xff @ get base (THR) reg address |
| 152 | strb \rd, [\rx] @ send lower byte of rd |
| 153 | orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR) |
| 154 | bic \rd, \rd, #(0xff << 24) @ restore original rd |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 155 | .endm |
| 156 | |
| 157 | .macro busyuart,rd,rx |
Nicolas Pitre | fa808a1 | 2011-09-01 00:48:04 -0400 | [diff] [blame] | 158 | 1001: ldrb \rd, [\rx] @ rx contains UART_LSR address |
Tony Lindgren | 4f2c49f | 2010-02-15 08:48:53 -0800 | [diff] [blame] | 159 | and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) |
| 160 | teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 161 | bne 1001b |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 162 | .endm |
| 163 | |
| 164 | .macro waituart,rd,rx |
| 165 | .endm |