Hi Fabio,
On 31.01.2012 15:53, Fabio Estevam wrote:
On 1/31/12, Matthias Fuchs matthias.fuchs@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,