[U-Boot] AT91 Rework

[Wolfgang Denk <wd@denx.de>]

Dear Jens,

In message <hcspnl$oud$1@ger.gmane.org> you wrote:
> 
> what you are mean to the following code snippet
> 
> it decrpipts then AT91 timercontroller and lot of TC configuration bits
> 
> I am on the right way?

Thanks - yes you are.

Umm... you are quite active for AT91 now - the position of  the  AT91
is still orphaned; did you ever think about volunteering?


> typedef struct at91_tcc {
> 	ulong		ccr;	/* 0x00 Channel Control Register */
> 	ulong		cmr;	/* 0x04 Channel Mode Register */
> 	ulong		reserved1[2];
> 	ulong		cv;	/* 0x10 Counter Value */
> 	ulong		ra;	/* 0x14 Register A */
> 	ulong		rb;	/* 0x18 Register B */
> 	ulong		rc;	/* 0x1C Register C */
> 	ulong		sr;	/* 0x20 Status Register */
> 	ulong		ier;	/* 0x24 Interrupt Enable Register */
> 	ulong		idr;	/* 0x28 Interrupt Disable Register */
> 	ulong		imr;	/* 0x2C Interrupt Mask Register */
> 	ulong		reserved3[4];
> } at91_tcc_t;

I recomment to make this "u32" instead of "ulong".

> #define AT91_TC_CCR_CLKEN	  ((ulong) 0x00000001)
> #define AT91_TC_CCR_CLKDIS	  ((ulong) 0x00000002)
> #define AT91_TC_CCR_SWTRG	  ((ulong) 0x00000004)

These casts should not be needed:

	#define AT91_TC_CCR_CLKEN	  1
	#define AT91_TC_CCR_CLKDIS	  2
	#define AT91_TC_CCR_SWTRG	  4

> typedef struct at91_tc {
> 	at91_tcc_t	tc[3];	/* 0x00 TC Channel 0-2 */
> 	ulong		bcr;	/* 0xC0 TC Block Control Register */
> 	ulong		bmr;	/* 0xC4 TC Block Mode Register */
> } at91_tc_t;

again, please use "u32" instead of "ulong".

> #define AT91_TC_BMR_TC0XC0S_TCLK0	((ulong) 0x00000000)
> #define AT91_TC_BMR_TC0XC0S_NONE	((ulong) 0x00000001)
> #define AT91_TC_BMR_TC0XC0S_TIOA1	((ulong) 0x00000002)
> #define AT91_TC_BMR_TC0XC0S_TIOA2	((ulong) 0x00000003)
> 
> #define AT91_TC_BMR_TC1XC1S_TCLK1	((ulong) 0x00000000)
> #define AT91_TC_BMR_TC1XC1S_NONE	((ulong) 0x00000004)
> #define AT91_TC_BMR_TC1XC1S_TIOA0	((ulong) 0x00000008)
> #define AT91_TC_BMR_TC1XC1S_TIOA2	((ulong) 0x0000000C)
> 
> #define AT91_TC_BMR_TC2XC0S_TCLK2	((ulong) 0x00000000)
> #define AT91_TC_BMR_TC2XC0S_NONE	((ulong) 0x00000010)
> #define AT91_TC_BMR_TC2XC0S_TIOA0	((ulong) 0x00000020)
> #define AT91_TC_BMR_TC2XC0S_TIOA1	((ulong) 0x00000030)

again, please drop at least the parens and the casts.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
To the systems programmer,  users  and  applications  serve  only  to
provide a test load.