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linux/arch/arm/mach-davinci/include/mach/debug-macro.S

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[ARM] 4303/3: base kernel support for TI DaVinci Add base kernel support for the TI DaVinci platform. This patch only includes interrupts, timers, CPU identification, serial support and basic power and sleep controller init. More drivers to come. Signed-off-by: Kevin Hilman <khilman@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-01 02:37:19 +08:00
/*
* Debugging macro for DaVinci
*
* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
*
* 2007 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
davinci: use 32-bit accesses for low-level debug macros This patch defines debug macros for low-level debugging for Davinci based platforms Tested on : - DM644x DaVinci EVM - DM646X DaVinciHD EVM - DM355 EVM This patch attempts to solve the low-level debug issue in DM646x. The UART on DM646x SoC allows only 32-bit access. The existing debug-macro.S uses the macros from debug-8250.S file. This led to garbage serial out in the case of DM646x. The inclusion of debug-8250.S does not allow for run time fix for this issue. There are compile time errors due to multiple definitions of the macros. Also when building a single image for multiple DaVinci Platforms, the ifdefs cannot be relied upon. The solution below does not include the debug-8250.S file and defines the necessary macros. This solution was arrived at after observing that word access does not affect the low-level debug messages on DM644x/DM355. The other approach to this issue is to use the UART module information available in the peripheral registers to decide the access mechanism. But this will have to be done for every access of UART specifically for DM646x. Also this calls for a modification of the debug-8250.S file. Signed-off-by: Chaithrika U S <chaithrika@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-01-19 16:43:05 +08:00
/* Modifications
* Jan 2009 Chaithrika U S Added senduart, busyuart, waituart
* macros, based on debug-8250.S file
* but using 32-bit accesses required for
* some davinci devices.
*/
#include <linux/serial_reg.h>
#define UART_SHIFT 2
ARM: 5910/1: ARM: Add tmp register for addruart and loadsp Otherwise more complicated uart configuration won't be possible. We can use r1 for tmp register for both head.S and debug.S. NOTE: This patch depends on another patch to add the the tmp register into all debug-macro.S files. That can be done with: $ sed -i -e "s/addruart,rx|addruart, rx/addruart, rx, tmp/" arch/arm/*/include/*/debug-macro.S Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-02-02 06:26:53 +08:00
.macro addruart, rx, tmp
[ARM] 4303/3: base kernel support for TI DaVinci Add base kernel support for the TI DaVinci platform. This patch only includes interrupts, timers, CPU identification, serial support and basic power and sleep controller init. More drivers to come. Signed-off-by: Kevin Hilman <khilman@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-01 02:37:19 +08:00
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
moveq \rx, #0x01000000 @ physical base address
movne \rx, #0xfe000000 @ virtual base
davinci: da8xx: Add support for DA830/OMAP-L137 EVM board Add support for the DA830/OMAP-L137 Evaluation Module (EVM) from TI. The EVM has User Interface (UI) and Audio cards that can be connected which contain various devices. Support for those devices and ones on the EVM will be added in subsequent patches. Additional generalizations for future SoCs in da8xx family done by Sudhakar Rajashekhara and Sekhar Nori. Signed-off-by: Steve Chen <schen@mvista.com> Signed-off-by: Mark A. Greer <mgreer@mvista.com> Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Cc: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-06-04 09:41:53 +08:00
#if defined(CONFIG_ARCH_DAVINCI_DA8XX) && defined(CONFIG_ARCH_DAVINCI_DMx)
#error Cannot enable DaVinci and DA8XX platforms concurrently
davinci: Add support for DA850/OMAP-L138 EVM board Add support for the DA850/OMAP-L138 Evaluation Module (EVM) from TI. The EVM has User Interface (UI) card which contains various devices. This UI card can be connected to the base board. Support for all the devices on the UI card and ones on the EVM will be added in subsequent patches. The EVM schematics are not available publicly yet; but should be available soon. A new defconfig for this board has been added mainly because the DA830/OMAP-L137 defconfig forces writethrough cache mode which is not required on DA850/OMAP-L138. This patch has been boot tested on DA850/OMAP-L138 EVM using ramdisk as filesystem. Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-07-16 18:42:18 +08:00
#elif defined(CONFIG_MACH_DAVINCI_DA830_EVM) || \
defined(CONFIG_MACH_DAVINCI_DA850_EVM)
davinci: da8xx: Add support for DA830/OMAP-L137 EVM board Add support for the DA830/OMAP-L137 Evaluation Module (EVM) from TI. The EVM has User Interface (UI) and Audio cards that can be connected which contain various devices. Support for those devices and ones on the EVM will be added in subsequent patches. Additional generalizations for future SoCs in da8xx family done by Sudhakar Rajashekhara and Sekhar Nori. Signed-off-by: Steve Chen <schen@mvista.com> Signed-off-by: Mark A. Greer <mgreer@mvista.com> Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Cc: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-06-04 09:41:53 +08:00
orr \rx, \rx, #0x00d00000 @ physical base address
orr \rx, \rx, #0x0000d000 @ of UART 2
#else
[ARM] 4303/3: base kernel support for TI DaVinci Add base kernel support for the TI DaVinci platform. This patch only includes interrupts, timers, CPU identification, serial support and basic power and sleep controller init. More drivers to come. Signed-off-by: Kevin Hilman <khilman@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-01 02:37:19 +08:00
orr \rx, \rx, #0x00c20000 @ UART 0
davinci: da8xx: Add support for DA830/OMAP-L137 EVM board Add support for the DA830/OMAP-L137 Evaluation Module (EVM) from TI. The EVM has User Interface (UI) and Audio cards that can be connected which contain various devices. Support for those devices and ones on the EVM will be added in subsequent patches. Additional generalizations for future SoCs in da8xx family done by Sudhakar Rajashekhara and Sekhar Nori. Signed-off-by: Steve Chen <schen@mvista.com> Signed-off-by: Mark A. Greer <mgreer@mvista.com> Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Cc: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-06-04 09:41:53 +08:00
#endif
[ARM] 4303/3: base kernel support for TI DaVinci Add base kernel support for the TI DaVinci platform. This patch only includes interrupts, timers, CPU identification, serial support and basic power and sleep controller init. More drivers to come. Signed-off-by: Kevin Hilman <khilman@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-05-01 02:37:19 +08:00
.endm
davinci: use 32-bit accesses for low-level debug macros This patch defines debug macros for low-level debugging for Davinci based platforms Tested on : - DM644x DaVinci EVM - DM646X DaVinciHD EVM - DM355 EVM This patch attempts to solve the low-level debug issue in DM646x. The UART on DM646x SoC allows only 32-bit access. The existing debug-macro.S uses the macros from debug-8250.S file. This led to garbage serial out in the case of DM646x. The inclusion of debug-8250.S does not allow for run time fix for this issue. There are compile time errors due to multiple definitions of the macros. Also when building a single image for multiple DaVinci Platforms, the ifdefs cannot be relied upon. The solution below does not include the debug-8250.S file and defines the necessary macros. This solution was arrived at after observing that word access does not affect the low-level debug messages on DM644x/DM355. The other approach to this issue is to use the UART module information available in the peripheral registers to decide the access mechanism. But this will have to be done for every access of UART specifically for DM646x. Also this calls for a modification of the debug-8250.S file. Signed-off-by: Chaithrika U S <chaithrika@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-01-19 16:43:05 +08:00
.macro senduart,rd,rx
str \rd, [\rx, #UART_TX << UART_SHIFT]
.endm
.macro busyuart,rd,rx
1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
bne 1002b
.endm
.macro waituart,rd,rx
#ifdef FLOW_CONTROL
1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT]
tst \rd, #UART_MSR_CTS
beq 1001b
#endif
.endm