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 <ezequiel.garcia@free-electrons.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2013-01-11 11:24:19 -08:00
parent be1f94812c
commit 808b7e0746
2 changed files with 246 additions and 0 deletions

View File

@ -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"
@ -459,6 +466,54 @@ config DEBUG_IMX6Q_UART_PORT
Choose UART port on which kernel low-level debug messages
should be output.
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
@ -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

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@ -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