static void configPIO(void)
{
/* Setup PIO of ASC device */
#if CFG_STM_ASC_BASE == ST40_ASC2_REGS_BASE /* UART #2 */
SET_PIO_ASC(PIO_PORT(4), 3, 2, 4, 5); /* UART2 - AS0 */
#else
#error Unsure which UART to configure!
#endif /* CFG_STM_ASC_BASE == ST40_ASC2_REGS_BASE */
/* Configure & Reset the Ethernet PHY */
configEthernet();
#if defined(CONFIG_SPI)
/* Configure for SPI Serial Flash */
configSpi();
#endif /* CONFIG_SPI */
}
extern int checkboard (void)
{
printf ("\n\nBoard: FLI7510 Development Board"
#ifdef CONFIG_ST40_SE_MODE
" [32-bit mode]"
#else
" [29-bit mode]"
#endif
"\n");
#if defined(CONFIG_SPI)
/*
* Configure for the SPI Serial Flash.
* Note: for CONFIG_SYS_BOOT_FROM_SPI + CONFIG_ENV_IS_IN_EEPROM, this
* needs to be done after env_init(), hence it is done
* here, and not in board_init().
*/
configSpi();
#endif /* CONFIG_SPI */
return 0;
}
/*
* initialise the SSC to talk to the slave SPI device.
*/
extern void spi_init(void)
{
//DECLARE_GLOBAL_DATA_PTR;
spi_chipsel_type const chipsel = spi_chipsel[0]; /* SPI Device #0 */
#if !defined(CONFIG_SOFT_SPI) /* Use SSC for SPI */
unsigned long reg;
const unsigned long bits_per_word = 8; /* one word == 8-bits */
const unsigned long mode = CFG_STM_SPI_MODE /* | SPI_LOOP */;
//const unsigned long fcomms = gd->bd->bi_emifrq*1000*1000;
const unsigned long hz = CFG_STM_SPI_FREQUENCY;
//unsigned long sscbrg = fcomms/(2*hz);
#endif /* CONFIG_SOFT_SPI */
/*init pio15.0-pio15.3*/
configSpi();
/* de-assert SPI CS */
(*chipsel)(0);
#if !defined(CONFIG_SOFT_SPI) /* Use SSC for SPI */
/* program the SSC's Baud-Rate Generator */
if ((sscbrg < 0x07u) || (sscbrg > (0x1u << 16)))
{
printk("ERROR: Unable to set SSC buad-rate generator to 0x%04x\n",
sscbrg);
return;
}
/* TODO: program pre-scaler for slower baud rates */
if (sscbrg == (0x1 << 16)) /* 16-bit counter wraps */
{
sscbrg = 0x0; /* slowest possible clock frequency */
}
ssc_write(SSC_BRG,sscbrg);
#if 0 /* QQQ */
printk("info: fcomms=%uMHz, SPI=%uHz, brg=0x%04x\n",
fcomms/1000/1000, hz, sscbrg);
#endif
/* Disable I2C sub-system */
ssc_write( SSC_I2C, 0x0);
/* Perform a S/W reset the SSC */
reg = ssc_read( SSC_CON);
reg |= SSC_CON_SR; /* enable software reset */
ssc_write( SSC_CON, reg);
udelay(1); /* let reset propagate */
reg = ssc_read( SSC_CON);
reg &= ~SSC_CON_SR; /* disable software reset */
ssc_write( SSC_CON, reg);
/* Configure & enable the SSC's control register */
reg = ssc_read(SSC_CON);
reg |= SSC_CON_EN; /* Enable the SSC */
reg |= SSC_CON_MS; /* set SSC as the SPI master */
if (mode & SPI_CPOL)
reg |= SSC_CON_PO; /* Clock idles at logic 1 */
else
reg &= ~SSC_CON_PO; /* Clock idles at logic 0 */
if (mode & SPI_CPHA)
reg |= SSC_CON_PH; /* Pulse in first half-cycle */
else
reg &= ~SSC_CON_PH; /* Pulse in second half-cycle */
if (mode & SPI_LSB_FIRST)
reg &= ~SSC_CON_HB; /* LSB first */
else
reg |= SSC_CON_HB; /* MSB first */
if (mode & SPI_LOOP)
reg |= SSC_CON_LPB; /* put SSC in loop-back mode */
else
reg &= ~SSC_CON_LPB; /* remove SSC from loop-back mode */
reg &= ~0x0ful; /* set bit width */
reg |= (bits_per_word - 1ul); /* set bit width */
ssc_write(SSC_CON,reg);
/* clear the status register */
(void)ssc_read(SSC_RBUF);
#endif /* CONFIG_SOFT_SPI */
/* now probe the serial flash, to ensure it is the correct one */
spi_probe_serial_flash(chipsel);
}
