* [U-Boot] Serial Com1 port not working
@ 2016-06-03 8:36 pc.ramachandra
0 siblings, 0 replies; only message in thread
From: pc.ramachandra @ 2016-06-03 8:36 UTC (permalink / raw
To: u-boot
I am using Custom IBM PowerPC 440GX Board.After Dumping the BIN file It is
not Display any thing in TeraTerm
Mainly i am refereed Ocotea Board. ocotea.c file i am not initialized FPGA
because in board we are not using.(Com1 port address also i am changed
#define CONFIG_SYS_NS16550_COM1 (CONFIG_SYS_PERIPHERAL_UART0_BASE)
(#define CONFIG_SYS_PERIPHERAL_UART0_BASE 0xa1080000)
-->Ocotea.c file Details
int board_early_init_f (void)
{
unsigned long mfr;
unsigned char *UartPtr;
int i;
UartPtr = (unsigned char *)(0xA1080000);
/* Basically i am sending one character to UART*/
*(UartPtr + 3) = 0x83;
for(i=0;i<100000;i++);
*(UartPtr + 0) = 0x1b;
for(i=0;i<100000;i++);
*(UartPtr + 1) = 0x00;
for(i=0;i<100000;i++);
*(UartPtr + 3) = 0x03;
for(i=0;i<100000;i++);
*(UartPtr + 0) = 0x41;
/*-------------------------------------------------------------------------+
| Initialize EBC CONFIG
+-------------------------------------------------------------------------*/
mtebc(EBC0_CFG, EBC_CFG_LE_UNLOCK |
EBC_CFG_PTD_ENABLE | EBC_CFG_RTC_64PERCLK |
EBC_CFG_ATC_PREVIOUS | EBC_CFG_DTC_PREVIOUS |
EBC_CFG_CTC_PREVIOUS | EBC_CFG_EMC_NONDEFAULT |
EBC_CFG_PME_DISABLE | EBC_CFG_PR_32);
/*-------------------------------------------------------------------------+
| 1 MB FLASH / 1 MB SRAM. Initialize bank 0 with default values.
+-------------------------------------------------------------------------*/
mtebc(PB0AP, EBC_BXAP_BME_DISABLED|EBC_BXAP_TWT_ENCODE(cs0_twt)|
EBC_BXAP_BCE_DISABLE|
EBC_BXAP_CSN_ENCODE(1)|EBC_BXAP_OEN_ENCODE(1)|
EBC_BXAP_WBN_ENCODE(1)|EBC_BXAP_WBF_ENCODE(1)|
EBC_BXAP_TH_ENCODE(1)|EBC_BXAP_RE_DISABLED|
EBC_BXAP_BEM_WRITEONLY|
EBC_BXAP_PEN_DISABLED);
mtebc(PB0CR, EBC_BXCR_BAS_ENCODE(cs0_base)|
cs0_size|EBC_BXCR_BU_RW|EBC_BXCR_BW_8BIT);
/*-------------------------------------------------------------------------+
| 4 MB FLASH. Initialize bank 2 with default values.
+-------------------------------------------------------------------------*/
mtebc(PB2AP, EBC_BXAP_BME_DISABLED|EBC_BXAP_TWT_ENCODE(cs2_twt)|
EBC_BXAP_BCE_DISABLE|
EBC_BXAP_CSN_ENCODE(1)|EBC_BXAP_OEN_ENCODE(1)|
EBC_BXAP_WBN_ENCODE(1)|EBC_BXAP_WBF_ENCODE(1)|
EBC_BXAP_TH_ENCODE(1)|EBC_BXAP_RE_DISABLED|
EBC_BXAP_BEM_WRITEONLY|
EBC_BXAP_PEN_DISABLED);
mtebc(PB2CR, EBC_BXCR_BAS_ENCODE(cs2_base)|
cs2_size|EBC_BXCR_BU_RW|EBC_BXCR_BW_8BIT);
mtdcr(UIC0SR, 0xffffffff); /* clear all */
mtdcr(UIC0ER, 0x00000000); /* disable all */
mtdcr(UIC0CR, 0x00000009); /* SMI & UIC1 crit are critical */
mtdcr(UIC0PR, 0xfffffe13); /* per ref-board manual */
mtdcr(UIC0TR, 0x01c00008); /* per ref-board manual */
mtdcr(UIC0VR, 0x00000001); /* int31 highest, base=0x000 */
mtdcr(UIC0SR, 0xffffffff); /* clear all */
mtdcr(UIC1SR, 0xffffffff); /* clear all */
mtdcr(UIC1ER, 0x00000000); /* disable all */
mtdcr(UIC1CR, 0x00000000); /* all non-critical */
mtdcr(UIC1PR, 0xffffe0ff); /* per ref-board manual */
mtdcr(UIC1TR, 0x00ffc000); /* per ref-board manual */
mtdcr(UIC1VR, 0x00000001); /* int31 highest, base=0x000 */
mtdcr(UIC1SR, 0xffffffff); /* clear all */
mfsdr (SDR0_MFR, mfr);
mfr &= ~SDR0_MFR_ECS_MASK;
UartPtr = (unsigned char *)(0xA1080000);
/* Basically i am sending one character to UART*/
*(UartPtr + 3) = 0x83;
for(i=0;i<100000;i++);
*(UartPtr + 0) = 0x1b;
for(i=0;i<100000;i++);
*(UartPtr + 1) = 0x00;
for(i=0;i<100000;i++);
*(UartPtr + 3) = 0x03;
for(i=0;i<100000;i++);
*(UartPtr + 0) = 0x42;
return 0;
}
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