[U-Boot] [PATCH v3 02/11] board:samsung: add function boot_device() for checking boot medium

[Przemyslaw Marczak]

Dear Minkyu,

On 06/27/2014 11:40 AM, Minkyu Kang wrote:
> Dear Przemyslaw Marczak,
>
> On 26/06/14 23:15, Przemyslaw Marczak wrote:
>> It is possible to boot from a few media devices, especially
>> using a micro SD or eMMC slots. In this situation depends on
>> a boot device - some setup can be changeg.
>>
>> This change adds function:
>> boot_device() - which returns an OM[1:5] bits value
>>
>> This allows checking if boot device is SD(0x2).
>>
>> Signed-off-by: Przemyslaw Marczak <p.marczak at samsung.com>
>>
>> ---
>> Changes v3:
>> - new commit after separate one into two
>> ---
>>   board/samsung/common/board.c | 10 +++++++++-
>>   include/samsung/misc.h       |  7 +++++++
>>   2 files changed, 16 insertions(+), 1 deletion(-)
>>
>> diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c
>> index 9dc7c83..ecf3f76 100644
>> --- a/board/samsung/common/board.c
>> +++ b/board/samsung/common/board.c
>> @@ -41,6 +41,13 @@ int __exynos_power_init(void)
>>   int exynos_power_init(void)
>>   	__attribute__((weak, alias("__exynos_power_init")));
>>
>> +unsigned int boot_device(void)
>> +{
>> +	unsigned int om_stat = samsung_get_base_power();
>> +
>> +	return BOOT_DEVICE(readl(om_stat));
>> +}
>> +
>>   #if defined CONFIG_EXYNOS_TMU
>>   /* Boot Time Thermal Analysis for SoC temperature threshold breach */
>>   static void boot_temp_check(void)
>> @@ -243,19 +250,20 @@ int board_eth_init(bd_t *bis)
>>   int board_mmc_init(bd_t *bis)
>>   {
>>   	int ret;
>> +
>>   #ifdef CONFIG_DWMMC
>>   	/* dwmmc initializattion for available channels */
>>   	ret = exynos_dwmmc_init(gd->fdt_blob);
>>   	if (ret)
>>   		debug("dwmmc init failed\n");
>>   #endif
>> -
>>   #ifdef CONFIG_SDHCI
>>   	/* mmc initializattion for available channels */
>>   	ret = exynos_mmc_init(gd->fdt_blob);
>>   	if (ret)
>>   		debug("mmc init failed\n");
>>   #endif
>> +
>>   	return ret;
>>   }
>>   #endif
>> diff --git a/include/samsung/misc.h b/include/samsung/misc.h
>> index 10653a1..57bac7d 100644
>> --- a/include/samsung/misc.h
>> +++ b/include/samsung/misc.h
>> @@ -28,4 +28,11 @@ void check_boot_mode(void);
>>   void draw_logo(void);
>>   #endif
>>
>> +#define BOOT_DEVICE_SDMMC	0x2
>> +#define BOOT_DEVICE_MASK	0x1f
>> +#define BOOT_DEVICE_SHIFT	0x1
>> +#define BOOT_DEVICE(x)		(((x) >> BOOT_DEVICE_SHIFT) & BOOT_DEVICE_MASK)
>> +
>> +unsigned int boot_device(void);
>
> Hm, do we need to make this function to non-static?
> If so, it should be placed in power.c - get_om_stat()?
>
> Thanks,
> Minkyu Kang.
>

It is non-static because it is called also outside this file, so I will 
move it to power.c.

Thank you,
-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com