[U-Boot] [PATCH 1/2] LPC2468 support

Tue Mar 24 23:33:37 CET 2009

Dear Remco Poelstra,

In message <49C8BE7A.10504 at duran-audio.com> you wrote:
> This patch includes support for the LPC2468 processor from NXP.
> 
> The example board will follow when this patch is OK.

Such a comment does not belong into the commit message. Please mode it
below the "---" line.

> Signed-off-by: Remco Poelstra <remco.poelstra+u-boot at duran-audio.com>
> ---
> diff -upNr u-boot-orig/cpu/arm720t/interrupts.c u-boot-cleanup/cpu/arm720t/interrupts.c
> --- u-boot-orig/cpu/arm720t/interrupts.c	2009-03-18 00:42:12.000000000 +0100
> +++ u-boot-cleanup/cpu/arm720t/interrupts.c	2009-03-24 11:48:50.000000000 +0100
> @@ -29,7 +29,11 @@
>   #include <common.h>
>   #include <clps7111.h>
>   #include <asm/proc-armv/ptrace.h>
> +#if defined(CONFIG_LPC2468)
> +#include <asm/arch/immap.h>
> +#else
>   #include <asm/hardware.h>
> +#endif

Is there no way we can do without such a #ifdef here?

>   #ifndef CONFIG_NETARM
>   /* we always count down the max. */
> @@ -40,6 +44,11 @@
>   #ifdef CONFIG_LPC2292
>   #undef READ_TIMER
>   #define READ_TIMER (0xFFFFFFFF - GET32(T0TC))
> +#elif defined(CONFIG_LPC2468)
> +#undef TIMER_LOAD_VAL
> +#define TIMER_LOAD_VAL 0
> +#undef READ_TIMER
> +#define READ_TIMER (0xFFFFFFFF - 0xE0004008)

NAK. When you have to #unifdef existing variable definitions, then
ther eis something fundamentally wrong. Please fix this problem at the
cause, i. e. where the wroing values are defined.

>   #endif
> 
>   #else
> @@ -80,6 +89,14 @@ void do_irq (struct pt_regs *pt_regs)
>       pfnct = (void (*)(void))VICVectAddr;
> 
>       (*pfnct)();
> +#elif defined(CONFIG_LPC2468)
> +	void (*pfnct) (void);
> +	vic_2468_t *vic = &(((immap_t *)CONFIG_SYS_IMMAP)->ahb.vic);
> +
> +	pfnct = (void (*)(void))(&(vic->vicaddr));
> +
> +	(*pfnct) ();

Is there no way to combine this code with the one for the LPC2292? It
doesn't look that different to me...

>   #else
>   #error do_irq() not defined for this CPU type
>   #endif
> @@ -112,6 +129,9 @@ static ulong lastdec;
> 
>   int interrupt_init (void)
>   {
> +#if defined(CONFIG_LPC2468)
> +	timer_2468_t *timer0=&(((immap_t *)CONFIG_SYS_IMMAP)->apb.timer0);
> +#endif
> 
>   #if defined(CONFIG_NETARM)
>   	/* disable all interrupts */
> @@ -185,6 +205,13 @@ int interrupt_init (void)
>   	PUT32(T0MCR, 0);
>   	PUT32(T0TC, 0);
>   	PUT32(T0TCR, 1);	/* enable timer0 */
> +#elif defined(CONFIG_LPC2468)
> +	PUT32 (&(timer0->ir), 0);		/*disable all timer0 interupts */
> +	PUT32 (&(timer0->tcr), 0);		/*disable timer0 */
> +	PUT32 (&(timer0->pr), CFG_SYS_CLK_FREQ / CONFIG_SYS_HZ - 1);
> +	PUT32 (&(timer0->mcr), 0);
> +	PUT32 (&(timer0->tc), 0);
> +	PUT32 (&(timer0->tcr), 1);

Again: Is there no way to combine this code with the one for the
LPC2292? It doesn't look that different to me...

...
> --- u-boot-orig/cpu/arm720t/lpc24xx/Makefile	1970-01-01 01:00:00.000000000 +0100
> +++ u-boot-cleanup/cpu/arm720t/lpc24xx/Makefile	2009-03-19 10:56:53.000000000 +0100
...
> +$(SOBJS):
> +	$(CC) $(AFLAGS) -march=armv4t -c -o $(SOBJS) iap_entry.S

Such compile options hsould probably be set globally, not just for
this single source file?

...
> +int serial_tstc (void)
> +{
> +	uart_2468_t *uart0=&(((immap_t *)CONFIG_SYS_IMMAP)->apb.uart0);
> +
> +	return (GET8 (&(uart0->lsr)) & 1);
> +}
> +
> +
> +
>   #endif

Get rid of all these empty lines, please.

> diff -upNr u-boot-orig/cpu/arm720t/start.S u-boot-cleanup/cpu/arm720t/start.S
> --- u-boot-orig/cpu/arm720t/start.S	2009-03-18 00:42:12.000000000 +0100
> +++ u-boot-cleanup/cpu/arm720t/start.S	2009-03-24 11:52:35.000000000 +0100
> @@ -127,7 +127,7 @@ reset:
>   	bl	cpu_init_crit
>   #endif
> 
> -#ifdef CONFIG_LPC2292
> +#if defined(CONFIG_LPC2292) || defined(CONFIG_LPC2468)

Is there no way to combine this code with the one for the LPC2292?

>   	bl	lowlevel_init
>   #endif
> 
> @@ -368,6 +368,10 @@ lock_loop:
>   	ldr	r0, VPBDIV_ADR
>   	mov	r1, #0x01	/* VPB clock is same as process clock */
>   	str	r1, [r0]
> +#elif defined(CONFIG_LPC2468)
> +    ldr r0, =0x40008000 /*0x40000000 is internal SRAM, 0x4000FFFF is end of SRAM*/

Line too long.

> +    mov sp,r0
> +    sub sl,sp,#0x2000

Indentation by TAB, please.

>   #else
>   #error No cpu_init_crit() defined for current CPU type
>   #endif
> @@ -383,7 +387,7 @@ lock_loop:
>   	str	r1, [r0]
>   #endif
> 
> -#ifndef CONFIG_LPC2292
> +#if	!defined(CONFIG_LPC2292) && !defined(CONFIG_LPC2468)

Is there no way to combine this code with the one for the LPC2292?

>   	mov	ip, lr
>   	/*
>   	 * before relocating, we have to setup RAM timing
> @@ -601,7 +605,7 @@ reset_cpu:
>    * on external peripherals such as watchdog timers, etc. */
>   #elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
>   	/* No specific reset actions for IntegratorAP/CM720T as yet */
> -#elif defined(CONFIG_LPC2292)
> +#elif defined(CONFIG_LPC2292) || defined(CONFIG_LPC2468)

Is there no way to combine this code with the one for the LPC2292?

>   	.align	5
>   .globl reset_cpu
>   reset_cpu:
> diff -upNr u-boot-orig/include/asm-arm/arch-lpc24xx/hardware.h u-boot-cleanup/include/asm-arm/arch-lpc24xx/hardware.h
> --- u-boot-orig/include/asm-arm/arch-lpc24xx/hardware.h	1970-01-01 01:00:00.000000000 +0100
> +++ u-boot-cleanup/include/asm-arm/arch-lpc24xx/hardware.h	2009-03-24 11:54:44.000000000 +0100
> @@ -0,0 +1,32 @@
> +#ifndef __ASM_ARCH_HARDWARE_H
> +#define __ASM_ARCH_HARDWARE_H
> +
> +/*
> + * Copyright (c) 2004	Cucy Systems (http://www.cucy.com)
> + * Curt Brune <curt at cucy.com>
> + *
> + * See file CREDITS for list of people who contributed to this
> + * project.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + */
> +
> +#if defined(CONFIG_LPC2468)
> +#else
> +#error No hardware file defined for this configuration
> +#endif
> +
> +#endif /* __ASM_ARCH_HARDWARE_H */

Ummm... What exactly is this file needed for?

> diff -upNr u-boot-orig/include/asm-arm/arch-lpc24xx/immap.h u-boot-cleanup/include/asm-arm/arch-lpc24xx/immap.h
> --- u-boot-orig/include/asm-arm/arch-lpc24xx/immap.h	1970-01-01 01:00:00.000000000 +0100
> +++ u-boot-cleanup/include/asm-arm/arch-lpc24xx/immap.h	2009-03-24 11:54:10.000000000 +0100
> @@ -0,0 +1,362 @@
> +/*
> + * (C) Copyright 2009 Duran Audio B.V.
> + *
> + * LPC2468 Internal Memory Map
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + *
> + */
> +
> +#ifndef __LPC24XX_IMMAP_H
> +#define __LPC24XX_IMMAP_H
> +
> +#include <asm/types.h>
> +#include <config.h>
> +
> +/* Macros for reading/writing registers */
> +#define PUT8(reg, value) (*(volatile unsigned char*)(reg) = (value))
> +#define PUT16(reg, value) (*(volatile unsigned short*)(reg) = (value))
> +#define PUT32(reg, value) (*(volatile unsigned int*)(reg) = (value))
> +#define GET8(reg) (*(volatile unsigned char*)(reg))
> +#define GET16(reg) (*(volatile unsigned short*)(reg))
> +#define GET32(reg) (*(volatile unsigned int*)(reg))

Do you clain these are proper accessor functions for your processor? 

> +#define BFS32(reg,value) (*(volatile unsigned int*)(reg) |= (value))
> +#define BFC32(reg, value) (*(volatile unsigned int*)(reg) &= (~value))
> +
> +typedef struct watchdog_2468 {
> +    u8 fixme[0x4000];
> +} watchdog2468_t;

Indentation by TAB, please - here and everywhere else.

> diff -upNr u-boot-orig/include/flash.h u-boot-cleanup/include/flash.h
> --- u-boot-orig/include/flash.h	2009-03-18 00:42:12.000000000 +0100
> +++ u-boot-cleanup/include/flash.h	2009-03-24 11:56:34.000000000 +0100
> @@ -339,7 +339,7 @@ extern flash_info_t *flash_get_info(ulon
>   #define TOSH_ID_FVT160	0xC2		/* TC58FVT160 ID (16 M, top )		*/
>   #define TOSH_ID_FVB160	0x43		/* TC58FVT160 ID (16 M, bottom )	*/
>   #define PHILIPS_LPC2292 0x0401FF13  /* LPC2292 internal FLASH			*/
> -
> +#define PHILIPS_LPC2468 0x0603FF35  /* LPC2468 internal FLASH			*/
>   /*-----------------------------------------------------------------------
>    * Internal FLASH identification codes
>    *

Please keep the empty line here.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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panic: can't find /