[PATCH 11/15] HiFive1: set up oscillators

[Denis Obrezkov]

2017-08-21 19:40 GMT+02:00 Gedare Bloom <gedare at rtems.org>:

> On Mon, Aug 21, 2017 at 12:27 PM, Denis Obrezkov
> <denisobrezkov at gmail.com> wrote:
> > 2017-08-17 17:16 GMT+02:00 Gedare Bloom <gedare at rtems.org>:
> >>
> >> On Wed, Aug 16, 2017 at 11:13 AM, Denis Obrezkov
> >> <denisobrezkov at gmail.com> wrote:
> >> > ---
> >> >  c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c | 65
> >> > +++++++++++++++++++++++
> >> >  1 file changed, 65 insertions(+)
> >> >  create mode 100644 c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c
> >> >
> >> > diff --git a/c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c
> >> > b/c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c
> >> > new file mode 100644
> >> > index 0000000..efef4e0
> >> > --- /dev/null
> >> > +++ b/c/src/lib/libbsp/riscv32/hifive1/start/bspstart.c
> >> > @@ -0,0 +1,65 @@
> >> > +/*
> >> > + *  Copyright (c) 2017
> >> > + *  Denis Obrezkov <denisobrezkov at gmail.com>
> >> > + *
> >> > + *  The license and distribution terms for this file may be
> >> > + *  found in the file LICENSE in this distribution or at
> >> > + *  http://www.rtems.org/license/LICENSE.
> >> > + */
> >> > +
> >> > +#include <bsp.h>
> >> > +#include <bsp/bootcard.h>
> >> > +#include <bsp/prci.h>
> >> > +#include <bsp/fe310.h>
> >> > +
> >> > +/*
> >> > + * This routine make initialization of HiFive1 (FE310) counters.
> >> > + */
> >> > +
> >> > +void bsp_start( void )
> >> > +{
> >> > +  volatile uint32_t * pll_reg = (volatile uint32_t *) PRCI_PLLCFG;
> >> > +  volatile uint32_t * high_freq_reg = (volatile uint32_t *)
> >> > PRCI_HFROSCCFG;
> >> > +  volatile uint32_t * spi0 = (volatile uint32_t *) 0x10014000;
> >> > +
> >> > +  volatile uint64_t * mtime_reg = (volatile uint64_t * ) 0x0200bff8;
> >> > +  volatile uint64_t * mtimecmp_reg = (volatile uint64_t * )
> 0x02004000;
> >> > +
> >> > +#ifdef USE_HFROSC
> >> > +  /* Setting up osc frequency */
> >> > +  uint32_t tmp_reg = 0;
> >> > +  /* Install divider in high frequency oscillator */
> >> > +  tmp_reg |= (HFROSC_DIV_VAL & 0x2f) << HFROSC_DIV_OFFSET;
> >> > +  tmp_reg |= (HFROSC_TRIM_VAL & 0x1F) << HFROSC_TRIM_OFFSET;
> >> > +  tmp_reg |= (HFROSC_EN_VAL & 0x1) << HFROSC_EN_OFFSET;
> >> > +  (*high_freq_reg) = tmp_reg;
> >> It would be good to make the above into a function.
> >
> > I agree but in what file should we place it?
> > it's not a clock or a timer.
>
> Some utility header for the bsp would be fine.
>
> >>
> >>
> >> > +  while (( (*high_freq_reg) & ((HFROSC_RDY_VAL & 0x1) \
> >> > +                  << HFROSC_RDY_OFFSET)) == 0 ) {
> >> > +    ;
> >> > +  }
> >> > +#endif /* USE_HFROSC */
> >> > +
> >> > +#ifdef USE_HFXOSC
> >> > +  volatile uint32_t * ext_freq_reg = (volatile uint32_t *)
> >> > PRCI_HFXOSCCFG;
> >> > +  (*ext_freq_reg) |= ((HFXOSC_EN_VAL & 0x1) << HFXOSC_EN_OFFSET);
> >> > +  while (( (*ext_freq_reg) & ((HFXOSC_RDY_VAL & 0x1) \
> >> > +                  << HFXOSC_RDY_OFFSET)) == 0 ) {
> >> > +    ;
> >> > +  }
> >> > +  (*pll_reg) |= (0x1 << 18);
> >> > +  (*pll_reg) |= (0x1 << 17);
> >> > +  (*pll_reg) |= (0x1 << PLL_SEL_OFFSET);
> >> > +  (*high_freq_reg) &= ~(0x1 << HFROSC_EN_OFFSET);
> >> > +
> >> > +#endif /* USE_HFXOSC */
> >> > +#ifndef USE_PLL
> >> > +  /* Disable PLL */
> >> > +  (*pll_reg) &= ~(0x1 << PLL_SEL_OFFSET);
> >> > +#else
> >> > +
> >> > +#endif
> >> > +
> >> > +  bsp_interrupt_initialize();
> >> > +
> >> > +}
> >> > +
> >> > --
> >> > 2.1.4
> >> >
> >> > _______________________________________________
> >> > devel mailing list
> >> > devel at rtems.org
> >> > http://lists.rtems.org/mailman/listinfo/devel
> >
> >
> >
> >
> > --
> > Regards, Denis Obrezkov
>

Do you mean to make it static inline?

-- 
Regards, Denis Obrezkov
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