[U-Boot] [PATCH 08/12] microblaze: timer: Prepare for device-tree initialization

[Stephan Linz]

Am Montag, den 09.07.2012, 11:20 +0200 schrieb Michal Simek: 
> microblaze: Fix CONFIG_SYS_HZ usage in board config
> 
> Do not use hardcoded value. Use CONFIG_SYS_HZ instead.
> Separate static configuration to single block.
> 
> Signed-off-by: Michal Simek <monstr at monstr.eu>
> ---
>  arch/microblaze/cpu/timer.c                    |   69 ++++++++++++-----------
>  arch/microblaze/include/asm/microblaze_timer.h |    3 +
>  arch/microblaze/lib/board.c                    |    5 --
>  include/configs/microblaze-generic.h           |   12 +----
>  4 files changed, 41 insertions(+), 48 deletions(-)
> 
> diff --git a/arch/microblaze/cpu/timer.c b/arch/microblaze/cpu/timer.c
> index cc6b897..dfaaaf5 100644
> --- a/arch/microblaze/cpu/timer.c
> +++ b/arch/microblaze/cpu/timer.c
> @@ -27,42 +27,30 @@
>  #include <asm/microblaze_intc.h>
>  
>  volatile int timestamp = 0;
> +microblaze_timer_t *tmr;
>  
> -#ifdef CONFIG_SYS_TIMER_0
>  ulong get_timer (ulong base)
>  {
> -	return (timestamp - base);
> +	if (tmr)
> +		return timestamp - base;
> +	return timestamp++ - base;
>  }
> -#else
> -ulong get_timer (ulong base)
> -{
> -	return (timestamp++ - base);
> -}
> -#endif
>  
> -#ifdef CONFIG_SYS_TIMER_0
>  void __udelay(unsigned long usec)
>  {
> -	int i;
> +	u32 i;
>  
> -	i = get_timer(0);
> -	while ((get_timer(0) - i) < (usec / 1000))
> -		;
> +	if (tmr) {
> +		i = get_timer(0);
> +		while ((get_timer(0) - i) < (usec / 1000))
> +			;

Hi Michal,

> +	} else {
> +		for (i = 0; i < (usec * XILINX_CLOCK_FREQ / 10000000); i++)
> +			;

this part should be enclosed by   #ifdef XILINX_CLOCK_FREQ


br,
Stephan Linz

> +	}
>  }
> -#else
> -void __udelay(unsigned long usec)
> -{
> -	unsigned int i;
>  
> -	for (i = 0; i < (usec * CONFIG_XILINX_CLOCK_FREQ / 10000000); i++)
> -		;
> -}
> -#endif
> -
> -#ifdef CONFIG_SYS_TIMER_0
> -microblaze_timer_t *tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR);
> -
> -void timer_isr (void *arg)
> +static void timer_isr(void *arg)
>  {
>  	timestamp++;
>  	tmr->control = tmr->control | TIMER_INTERRUPT;
> @@ -70,15 +58,30 @@ void timer_isr (void *arg)
>  
>  int timer_init (void)
>  {
> -	tmr->loadreg = CONFIG_SYS_TIMER_0_PRELOAD;
> -	tmr->control = TIMER_INTERRUPT | TIMER_RESET;
> -	tmr->control =
> -	    TIMER_ENABLE | TIMER_ENABLE_INTR | TIMER_RELOAD | TIMER_DOWN_COUNT;
> -	timestamp = 0;
> -	install_interrupt_handler (CONFIG_SYS_TIMER_0_IRQ, timer_isr, (void *)tmr);
> +	u32 irq = 0;
> +	u32 preload = 0;
> +	u32 ret = 0;
> +
> +#if defined(CONFIG_SYS_TIMER_0_ADDR) && defined(CONFIG_SYS_INTC_0_NUM)
> +	preload = XILINX_CLOCK_FREQ / CONFIG_SYS_HZ;
> +	irq = CONFIG_SYS_TIMER_0_IRQ;
> +	tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR);
> +#endif
> +
> +	if (tmr && irq && preload) {
> +		tmr->loadreg = preload;
> +		tmr->control = TIMER_INTERRUPT | TIMER_RESET;
> +		tmr->control = TIMER_ENABLE | TIMER_ENABLE_INTR |\
> +					TIMER_RELOAD | TIMER_DOWN_COUNT;
> +		timestamp = 0;
> +		ret = install_interrupt_handler (irq, timer_isr, (void *)tmr);
> +		if (ret)
> +			tmr = NULL;
> +	}
> +
> +	/* No problem if timer is not found/initialized */
>  	return 0;
>  }
> -#endif
>  
>  /*
>   * This function is derived from PowerPC code (read timebase as long long).
> diff --git a/arch/microblaze/include/asm/microblaze_timer.h b/arch/microblaze/include/asm/microblaze_timer.h
> index 844c8db..28e8b02 100644
> --- a/arch/microblaze/include/asm/microblaze_timer.h
> +++ b/arch/microblaze/include/asm/microblaze_timer.h
> @@ -39,3 +39,6 @@ typedef volatile struct microblaze_timer_t {
>  	int loadreg; /* load register TLR */
>  	int counter; /* timer/counter register */
>  } microblaze_timer_t;
> +
> +int timer_init(void);
> +
> diff --git a/arch/microblaze/lib/board.c b/arch/microblaze/lib/board.c
> index 8cf4266..ddbc862 100644
> --- a/arch/microblaze/lib/board.c
> +++ b/arch/microblaze/lib/board.c
> @@ -40,9 +40,6 @@ DECLARE_GLOBAL_DATA_PTR;
>  #ifdef CONFIG_SYS_GPIO_0
>  extern int gpio_init (void);
>  #endif
> -#ifdef CONFIG_SYS_TIMER_0
> -extern int timer_init (void);
> -#endif
>  #ifdef CONFIG_SYS_FSL_2
>  extern void fsl_init2 (void);
>  #endif
> @@ -72,9 +69,7 @@ init_fnc_t *init_sequence[] = {
>  	gpio_init,
>  #endif
>  	interrupts_init,
> -#ifdef CONFIG_SYS_TIMER_0
>  	timer_init,
> -#endif
>  #ifdef CONFIG_SYS_FSL_2
>  	fsl_init2,
>  #endif
> diff --git a/include/configs/microblaze-generic.h b/include/configs/microblaze-generic.h
> index 44934eb..9f90107 100644
> --- a/include/configs/microblaze-generic.h
> +++ b/include/configs/microblaze-generic.h
> @@ -102,19 +102,11 @@
>  #endif
>  
>  /* timer */
> -#ifdef XILINX_TIMER_BASEADDR
> -# if (XILINX_TIMER_IRQ != -1)
> -#  define CONFIG_SYS_TIMER_0		1
> +#if defined(XILINX_TIMER_BASEADD) && defined(XILINX_TIMER_IRQ)
>  #  define CONFIG_SYS_TIMER_0_ADDR	XILINX_TIMER_BASEADDR
>  #  define CONFIG_SYS_TIMER_0_IRQ	XILINX_TIMER_IRQ
> -#  define FREQUENCE	XILINX_CLOCK_FREQ
> -#  define CONFIG_SYS_TIMER_0_PRELOAD	( FREQUENCE/1000 )
> -# endif
> -#elif XILINX_CLOCK_FREQ
> -# define CONFIG_XILINX_CLOCK_FREQ	XILINX_CLOCK_FREQ
> -#else
> -# error BAD CLOCK FREQ
>  #endif
> +
>  /* FSL */
>  /* #define	CONFIG_SYS_FSL_2 */
>  /* #define	FSL_INTR_2	1 */

-- 
Viele Grüße,
Stephan Linz
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