diff options
| -rw-r--r-- | arch/arm/Kconfig.debug | 56 | ||||
| -rw-r--r-- | arch/arm/include/debug/omap2plus.S | 190 |
2 files changed, 246 insertions, 0 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 661030d6bc6c..8cccce36b067 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -291,6 +291,13 @@ choice Say Y here if you want kernel low-level debugging support on MVEBU based platforms. + config DEBUG_OMAP2PLUS_UART + bool "Kernel low-level debugging messages via OMAP2PLUS UART" + depends on ARCH_OMAP2PLUS + help + Say Y here if you want kernel low-level debugging support + on OMAP2PLUS based platforms. + config DEBUG_PICOXCELL_UART depends on ARCH_PICOXCELL bool "Use PicoXcell UART for low-level debug" @@ -461,6 +468,54 @@ config DEBUG_IMX6Q_UART_PORT choice prompt "Low-level debug console UART" + depends on DEBUG_OMAP2PLUS_UART + + config DEBUG_OMAP2UART1 + bool "OMAP2/3/4 UART1 (omap2/3 sdp boards and some omap3 boards)" + help + This covers at least h4, 2430sdp, 3430sdp, 3630sdp, + omap3 torpedo and 3530 lv som. + + config DEBUG_OMAP2UART2 + bool "OMAP2/3/4 UART2" + + config DEBUG_OMAP2UART3 + bool "OMAP2 UART3 (n8x0)" + + config DEBUG_OMAP3UART3 + bool "OMAP3 UART3 (most omap3 boards)" + help + This covers at least cm_t3x, beagle, crane, devkit8000, + igep00x0, ldp, n900, n9(50), pandora, overo, touchbook, + and 3517evm. + + config DEBUG_OMAP4UART3 + bool "OMAP4/5 UART3 (omap4 blaze, panda, omap5 sevm)" + + config DEBUG_OMAP3UART4 + bool "OMAP36XX UART4" + + config DEBUG_OMAP4UART4 + bool "OMAP4/5 UART4" + + config DEBUG_TI81XXUART1 + bool "TI81XX UART1 (ti8148evm)" + + config DEBUG_TI81XXUART2 + bool "TI81XX UART2" + + config DEBUG_TI81XXUART3 + bool "TI81XX UART3 (ti8168evm)" + + config DEBUG_AM33XXUART1 + bool "AM33XX UART1" + + config DEBUG_ZOOM_UART + bool "Zoom2/3 UART" +endchoice + +choice + prompt "Low-level debug console UART" depends on DEBUG_LL && DEBUG_TEGRA_UART config TEGRA_DEBUG_UART_AUTO_ODMDATA @@ -501,6 +556,7 @@ config DEBUG_LL_INCLUDE DEBUG_IMX6Q_UART default "debug/highbank.S" if DEBUG_HIGHBANK_UART default "debug/mvebu.S" if DEBUG_MVEBU_UART + default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART default "debug/socfpga.S" if DEBUG_SOCFPGA_UART default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1 diff --git a/arch/arm/include/debug/omap2plus.S b/arch/arm/include/debug/omap2plus.S new file mode 100644 index 000000000000..6d867aef18eb --- /dev/null +++ b/arch/arm/include/debug/omap2plus.S @@ -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. + * +*/ + +#include <linux/serial_reg.h> + +/* OMAP2 serial ports */ +#define OMAP2_UART1_BASE 0x4806a000 +#define OMAP2_UART2_BASE 0x4806c000 +#define OMAP2_UART3_BASE 0x4806e000 + +/* 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 */ + +/* 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 + +/* TI81XX serial ports */ +#define TI81XX_UART1_BASE 0x48020000 +#define TI81XX_UART2_BASE 0x48022000 +#define TI81XX_UART3_BASE 0x48024000 + +/* AM3505/3517 UART4 */ +#define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */ + +/* AM33XX serial port */ +#define AM33XX_UART1_BASE 0x44E09000 + +/* 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 + +/* External port on Zoom2/3 */ +#define ZOOM_UART_BASE 0x10000000 +#define ZOOM_UART_VIRT 0xfa400000 + +#define OMAP_PORT_SHIFT 2 +#define ZOOM_PORT_SHIFT 1 + +#define UART_OFFSET(addr) ((addr) & 0x00ffffff) + + .pushsection .data +omap_uart_phys: .word 0 +omap_uart_virt: .word 0 +omap_uart_lsr: .word 0 + .popsection + + .macro addruart, rp, rv, tmp + + /* 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 + + /* 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 + + /* 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 + + b 10b + + /* 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 + + b 10b + + .align +99: .word . + .word omap_uart_phys + .ltorg + +100: /* Pass the UART_LSR reg address */ + ldr \tmp, [\tmp, #8] @ omap_uart_lsr + add \rp, \rp, \tmp + add \rv, \rv, \tmp + .endm + + .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 + + .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 + + .macro waituart,rd,rx + .endm |