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ARM: OMAP2+: Add multiplatform debug_ll support
Add multiplatform debug_ll support by stripping away the custom hacks to detect the port from debug-macro.S. Note that this now requires the specific debug_ll port to be selected in the .config. The old debug-macro.S will be removed a bit later once we are sure things work properly with multiplatform enabled. Tested-by: Ezequiel Garcia <[email protected]> Signed-off-by: Tony Lindgren <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,190 @@ | ||
| /* | ||
| * Debugging macro include header | ||
| * | ||
| * Copyright (C) 1994-1999 Russell King | ||
| * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License version 2 as | ||
| * published by the Free Software Foundation. | ||
| * | ||
| */ | ||
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| #include <linux/serial_reg.h> | ||
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| /* OMAP2 serial ports */ | ||
| #define OMAP2_UART1_BASE 0x4806a000 | ||
| #define OMAP2_UART2_BASE 0x4806c000 | ||
| #define OMAP2_UART3_BASE 0x4806e000 | ||
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| /* OMAP3 serial ports */ | ||
| #define OMAP3_UART1_BASE OMAP2_UART1_BASE | ||
| #define OMAP3_UART2_BASE OMAP2_UART2_BASE | ||
| #define OMAP3_UART3_BASE 0x49020000 | ||
| #define OMAP3_UART4_BASE 0x49042000 /* Only on 36xx */ | ||
| #define OMAP3_UART4_AM35XX_BASE 0x4809E000 /* Only on AM35xx */ | ||
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| /* OMAP4 serial ports */ | ||
| #define OMAP4_UART1_BASE OMAP2_UART1_BASE | ||
| #define OMAP4_UART2_BASE OMAP2_UART2_BASE | ||
| #define OMAP4_UART3_BASE 0x48020000 | ||
| #define OMAP4_UART4_BASE 0x4806e000 | ||
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| /* TI81XX serial ports */ | ||
| #define TI81XX_UART1_BASE 0x48020000 | ||
| #define TI81XX_UART2_BASE 0x48022000 | ||
| #define TI81XX_UART3_BASE 0x48024000 | ||
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| /* AM3505/3517 UART4 */ | ||
| #define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */ | ||
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| /* AM33XX serial port */ | ||
| #define AM33XX_UART1_BASE 0x44E09000 | ||
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| /* OMAP5 serial ports */ | ||
| #define OMAP5_UART1_BASE OMAP2_UART1_BASE | ||
| #define OMAP5_UART2_BASE OMAP2_UART2_BASE | ||
| #define OMAP5_UART3_BASE OMAP4_UART3_BASE | ||
| #define OMAP5_UART4_BASE OMAP4_UART4_BASE | ||
| #define OMAP5_UART5_BASE 0x48066000 | ||
| #define OMAP5_UART6_BASE 0x48068000 | ||
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| /* External port on Zoom2/3 */ | ||
| #define ZOOM_UART_BASE 0x10000000 | ||
| #define ZOOM_UART_VIRT 0xfa400000 | ||
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| #define OMAP_PORT_SHIFT 2 | ||
| #define ZOOM_PORT_SHIFT 1 | ||
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| #define UART_OFFSET(addr) ((addr) & 0x00ffffff) | ||
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| .pushsection .data | ||
| omap_uart_phys: .word 0 | ||
| omap_uart_virt: .word 0 | ||
| omap_uart_lsr: .word 0 | ||
| .popsection | ||
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| .macro addruart, rp, rv, tmp | ||
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| /* Use omap_uart_phys/virt if already configured */ | ||
| 10: adr \rp, 99f @ get effective addr of 99f | ||
| ldr \rv, [\rp] @ get absolute addr of 99f | ||
| sub \rv, \rv, \rp @ offset between the two | ||
| ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys | ||
| sub \tmp, \rp, \rv @ make it effective | ||
| ldr \rp, [\tmp, #0] @ omap_uart_phys | ||
| ldr \rv, [\tmp, #4] @ omap_uart_virt | ||
| cmp \rp, #0 @ is port configured? | ||
| cmpne \rv, #0 | ||
| bne 100f @ already configured | ||
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| /* Configure the UART offset from the phys/virt base */ | ||
| #ifdef CONFIG_DEBUG_OMAP2UART1 | ||
| mov \rp, #UART_OFFSET(OMAP2_UART1_BASE) @ omap2/3/4 | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_OMAP2UART2 | ||
| mov \rp, #UART_OFFSET(OMAP2_UART2_BASE) @ omap2/3/4 | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_OMAP2UART3 | ||
| mov \rp, #UART_OFFSET(OMAP2_UART3_BASE) | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_OMAP3UART3 | ||
| mov \rp, #UART_OFFSET(OMAP3_UART1_BASE) | ||
| add \rp, \rp, #0x00fb0000 | ||
| add \rp, \rp, #0x00006000 @ OMAP3_UART3_BASE | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_OMAP4UART3 | ||
| mov \rp, #UART_OFFSET(OMAP4_UART3_BASE) | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_OMAP3UART4 | ||
| mov \rp, #UART_OFFSET(OMAP3_UART1_BASE) | ||
| add \rp, \rp, #0x00fb0000 | ||
| add \rp, \rp, #0x00028000 @ OMAP3_UART4_BASE | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_OMAP4UART4 | ||
| mov \rp, #UART_OFFSET(OMAP4_UART4_BASE) | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_TI81XXUART1 | ||
| mov \rp, #UART_OFFSET(TI81XX_UART1_BASE) | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_TI81XXUART2 | ||
| mov \rp, #UART_OFFSET(TI81XX_UART2_BASE) | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_TI81XXUART3 | ||
| mov \rp, #UART_OFFSET(TI81XX_UART3_BASE) | ||
| b 98f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_AM33XXUART1 | ||
| ldr \rp, =AM33XX_UART1_BASE | ||
| and \rp, \rp, #0x00ffffff | ||
| b 97f | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_ZOOM_UART | ||
| ldr \rp, =ZOOM_UART_BASE | ||
| str \rp, [\tmp, #0] @ omap_uart_phys | ||
| ldr \rp, =ZOOM_UART_VIRT | ||
| str \rp, [\tmp, #4] @ omap_uart_virt | ||
| mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT) | ||
| str \rp, [\tmp, #8] @ omap_uart_lsr | ||
| #endif | ||
| b 10b | ||
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| /* AM33XX: Store both phys and virt address for the uart */ | ||
| 97: add \rp, \rp, #0x44000000 @ phys base | ||
| str \rp, [\tmp, #0] @ omap_uart_phys | ||
| sub \rp, \rp, #0x44000000 @ phys base | ||
| add \rp, \rp, #0xf9000000 @ virt base | ||
| str \rp, [\tmp, #4] @ omap_uart_virt | ||
| mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) | ||
| str \rp, [\tmp, #8] @ omap_uart_lsr | ||
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| b 10b | ||
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| /* Store both phys and virt address for the uart */ | ||
| 98: add \rp, \rp, #0x48000000 @ phys base | ||
| str \rp, [\tmp, #0] @ omap_uart_phys | ||
| sub \rp, \rp, #0x48000000 @ phys base | ||
| add \rp, \rp, #0xfa000000 @ virt base | ||
| str \rp, [\tmp, #4] @ omap_uart_virt | ||
| mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) | ||
| str \rp, [\tmp, #8] @ omap_uart_lsr | ||
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| b 10b | ||
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| .align | ||
| 99: .word . | ||
| .word omap_uart_phys | ||
| .ltorg | ||
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| 100: /* Pass the UART_LSR reg address */ | ||
| ldr \tmp, [\tmp, #8] @ omap_uart_lsr | ||
| add \rp, \rp, \tmp | ||
| add \rv, \rv, \tmp | ||
| .endm | ||
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| .macro senduart,rd,rx | ||
| orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset | ||
| bic \rx, \rx, #0xff @ get base (THR) reg address | ||
| strb \rd, [\rx] @ send lower byte of rd | ||
| orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR) | ||
| bic \rd, \rd, #(0xff << 24) @ restore original rd | ||
| .endm | ||
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| .macro busyuart,rd,rx | ||
| 1001: ldrb \rd, [\rx] @ rx contains UART_LSR address | ||
| and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) | ||
| teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) | ||
| bne 1001b | ||
| .endm | ||
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| .macro waituart,rd,rx | ||
| .endm |