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Add I2C and RTC support for RMU board using software I2C driver 

(because of better response to iprobe command); fix problem with
"reset" command
This commit is contained in:
wdenk 2003-08-29 10:05:53 +00:00
parent 437ce07b8a
commit ca75added1
3 changed files with 40 additions and 12 deletions
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4
CHANGELOG
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@ -2,6 +2,10 @@
Changes for U-Boot 0.4.7:
======================================================================
* Add I2C and RTC support for RMU board using software I2C driver
(because of better response to iprobe command); fix problem with
"reset" command
* Patch by Matthias Fuchs, 28 Aug 2003:
Added CONFIG_BOOTP_DNS2 and CONFIG_BOOTP_SEND_HOSTNAME to
CONFIG_BOOTP_MAKS (see README).

36
include/configs/rmu.h
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@ -61,8 +61,39 @@
#define CONFIG_LOADS_ECHO 1 /* echo on for serial download */
#undef CFG_LOADS_BAUD_CHANGE /* don't allow baudrate change */
/* enable I2C and select the hardware/software driver */
#undef CONFIG_HARD_I2C /* I2C with hardware support */
#define CONFIG_SOFT_I2C 1 /* I2C bit-banged */
#define CFG_I2C_SPEED 40000 /* 40 kHz is supposed to work */
#define CFG_I2C_SLAVE 0xFE
/* Software (bit-bang) I2C driver configuration */
#define PB_SCL 0x00000020 /* PB 26 */
#define PB_SDA 0x00000010 /* PB 27 */
#define I2C_INIT (immr->im_cpm.cp_pbdir |= PB_SCL)
#define I2C_ACTIVE (immr->im_cpm.cp_pbdir |= PB_SDA)
#define I2C_TRISTATE (immr->im_cpm.cp_pbdir &= ~PB_SDA)
#define I2C_READ ((immr->im_cpm.cp_pbdat & PB_SDA) != 0)
#define I2C_SDA(bit) if(bit) immr->im_cpm.cp_pbdat |= PB_SDA; \
else immr->im_cpm.cp_pbdat &= ~PB_SDA
#define I2C_SCL(bit) if(bit) immr->im_cpm.cp_pbdat |= PB_SCL; \
else immr->im_cpm.cp_pbdat &= ~PB_SCL
#define I2C_DELAY udelay(5) /* 1/4 I2C clock duration */
/* M41T11 Serial Access Timekeeper(R) SRAM */
#define CONFIG_RTC_M41T11 1
#define CFG_I2C_RTC_ADDR 0x68
#define CFG_M41T11_BASE_YEAR 1900 /* play along with the linux driver */
#undef CONFIG_WATCHDOG /* watchdog disabled */
#define CONFIG_COMMANDS ( CONFIG_CMD_DFL | \
CFG_CMD_DATE | \
CFG_CMD_DHCP | \
CFG_CMD_I2C )
#define CONFIG_BOOTP_MASK (CONFIG_BOOTP_DEFAULT | CONFIG_BOOTP_BOOTFILESIZE)
/* this must be included AFTER the definition of CONFIG_COMMANDS (if any) */
@ -152,6 +183,11 @@
#define CFG_ENV_OFFSET_REDUND (CFG_ENV_OFFSET+CFG_ENV_SIZE)
#define CFG_ENV_SIZE_REDUND (CFG_ENV_SIZE)
/*-----------------------------------------------------------------------
* Reset address
*/
#define CFG_RESET_ADDRESS ((ulong)((((immap_t *)CFG_IMMR)->im_clkrst.res)))
/*-----------------------------------------------------------------------
* Cache Configuration
*/

12
include/watchdog.h
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@ -85,16 +85,4 @@
void reset_4xx_watchdog(void);
#endif
/* MPC 8260 */
#if defined(CONFIG_MPC8260) && !defined(__ASSEMBLY__)
#if defined(CONFIG_WATCHDOG)
extern __inline__ void
reset_8260_watchdog(volatile immap_t *immr)
{
immr->im_siu_conf.sc_swsr = 0x556c;
immr->im_siu_conf.sc_swsr = 0xaa39;
}
#endif /* !__ASSEMBLY__ && CONFIG_WATCHDOG */
#endif /* CONFIG_MPC8260 && !__ASSEMBLY__ */
#endif /* _WATCHDOG_H_ */