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68d9ab394f
Patch from Ben Dooks Add support for the Samsung S3C2412 and S3C2413 range of SoCs. This patch contains the core identification, debug macros, and basic register updates to get these to build. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
105 lines
2.6 KiB
ArmAsm
105 lines
2.6 KiB
ArmAsm
/* linux/include/asm-arm/arch-s3c2410/debug-macro.S
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*
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* Debugging macro include header
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*
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* Copyright (C) 1994-1999 Russell King
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* Copyright (C) 2005 Simtec Electronics
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*
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* Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Modifications:
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* 10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA
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*/
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#include <asm/arch/map.h>
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#include <asm/arch/regs-serial.h>
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#include <asm/arch/regs-gpio.h>
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#define S3C2410_UART1_OFF (0x4000)
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#define SHIFT_2440TXF (14-9)
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.macro addruart, rx
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mrc p15, 0, \rx, c1, c0
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tst \rx, #1
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ldreq \rx, = S3C24XX_PA_UART
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ldrne \rx, = S3C24XX_VA_UART
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#if CONFIG_DEBUG_S3C2410_UART != 0
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add \rx, \rx, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C2410_UART)
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#endif
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.endm
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.macro senduart,rd,rx
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strb \rd, [\rx, # S3C2410_UTXH ]
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.endm
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.macro busyuart, rd, rx
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ldr \rd, [ \rx, # S3C2410_UFCON ]
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tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
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beq 1001f @
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@ FIFO enabled...
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1003:
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@ check for arm920 vs arm926. currently assume all arm926
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@ devices have an 64 byte FIFO identical to the s3c2440
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mrc p15, 0, \rd, c0, c0
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and \rd, \rd, #0xff0
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teq \rd, #0x260
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beq 1004f
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mrc p15, 0, \rd, c1, c0
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tst \rd, #1
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addeq \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
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addne \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
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bic \rd, \rd, #0xff000
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ldr \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
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and \rd, \rd, #0x00ff0000
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teq \rd, #0x00440000 @ is it 2440?
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1004:
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ldr \rd, [ \rx, # S3C2410_UFSTAT ]
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moveq \rd, \rd, lsr #SHIFT_2440TXF
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tst \rd, #S3C2410_UFSTAT_TXFULL
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bne 1003b
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b 1002f
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1001:
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@ busy waiting for non fifo
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ldr \rd, [ \rx, # S3C2410_UTRSTAT ]
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tst \rd, #S3C2410_UTRSTAT_TXFE
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beq 1001b
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1002: @ exit busyuart
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.endm
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.macro waituart,rd,rx
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ldr \rd, [ \rx, # S3C2410_UFCON ]
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tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
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beq 1001f @
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@ FIFO enabled...
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1003:
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mrc p15, 0, \rd, c1, c0
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tst \rd, #1
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addeq \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
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addne \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
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bic \rd, \rd, #0xff000
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ldr \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
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and \rd, \rd, #0x00ff0000
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teq \rd, #0x00440000 @ is it 2440?
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ldr \rd, [ \rx, # S3C2410_UFSTAT ]
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andne \rd, \rd, #S3C2410_UFSTAT_TXMASK
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andeq \rd, \rd, #S3C2440_UFSTAT_TXMASK
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teq \rd, #0
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bne 1003b
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b 1002f
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1001:
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@ idle waiting for non fifo
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ldr \rd, [ \rx, # S3C2410_UTRSTAT ]
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tst \rd, #S3C2410_UTRSTAT_TXFE
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beq 1001b
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1002: @ exit busyuart
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.endm
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