Hi Fabio, On 31.01.2012 15:53, Fabio Estevam wrote: > On 1/31/12, Matthias Fuchs <matthias.fu...@esd.eu> wrote: > >> The USB boot mechanism is not documented that detailed. >> Is it possible that the SPL code overwrites the bootroms ivt and >> in consequence crashes the bootrom's USB code? Any further ideas? > > Completely untested, but please give it a try: Good idea. But it does not help. I expect, that the bootrom enables all required clocks. As long as the SPL does not turn them of they should stay enabled because of the set/clear-register pairs.
Matthias > > diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c > b/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c > index 00493b8..313b5c7 100644 > --- a/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c > +++ b/arch/arm/cpu/arm926ejs/mx28/spl_mem_init.c > @@ -201,8 +201,8 @@ void mx28_mem_init(void) > writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2, > &pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set); > > - /* Power up PLL0 */ > - writel(CLKCTRL_PLL0CTRL0_POWER, > + /* Power up PLL0 and USB clocks */ > + writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS | CLKCTRL_PLL0CTRL0_POWER, > &clkctrl_regs->hw_clkctrl_pll0ctrl0_set); > > early_delay(11000); > diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c > b/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c > index 380b120..e55f552 100644 > --- a/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c > +++ b/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c > @@ -45,7 +45,7 @@ void mx28_power_clock2pll(void) > struct mx28_clkctrl_regs *clkctrl_regs = > (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE; > > - writel(CLKCTRL_PLL0CTRL0_POWER, > + writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS | CLKCTRL_PLL0CTRL0_POWER, > &clkctrl_regs->hw_clkctrl_pll0ctrl0_set); > early_delay(100); > writel(CLKCTRL_CLKSEQ_BYPASS_CPU, > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
