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imx233: fix emi for stmp3600 and stmp3700

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Currently don't do anything on stmp3600 because emi is completely
different. On stmp3700 it is unsure how the pll lock is handled
and this will need more testing.

Change-Id: I3d11282531f54f2ecc4187c0d913e2c61f4de14d
This commit is contained in:
Amaury Pouly 2013-06-17 00:18:40 +02:00
parent e671472c3f
commit 86ff093267
1 changed files with 8 additions and 1 deletions
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7
firmware/target/arm/imx233/emi-imx233.c
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@ -89,6 +89,7 @@ static struct emi_reg_t settings_155M[15] ICONST_ATTR __attribute__((alias("sett
static void set_frequency(unsigned long freq) ICODE_ATTR; static void set_frequency(unsigned long freq) ICODE_ATTR;
#if IMX233_SUBTARGET >= 3700
static void set_frequency(unsigned long freq) static void set_frequency(unsigned long freq)
{ {
/** WARNING all restriction of imx233_emi_set_frequency apply here !! */ /** WARNING all restriction of imx233_emi_set_frequency apply here !! */
@ -172,7 +173,10 @@ void imx233_emi_set_frequency(unsigned long freq)
/* wait for transition */ /* wait for transition */
while(BF_RD(CLKCTRL_EMI, BUSY_REF_XTAL)); while(BF_RD(CLKCTRL_EMI, BUSY_REF_XTAL));
/* put emi dll into reset mode */ /* put emi dll into reset mode */
// FIXME Unsure about what to do for stmp37xx
#if IMX233_SUBTARGET >= 3780
HW_EMI_CTRL_SET = BM_EMI_CTRL_DLL_RESET | BM_EMI_CTRL_DLL_SHIFT_RESET; HW_EMI_CTRL_SET = BM_EMI_CTRL_DLL_RESET | BM_EMI_CTRL_DLL_SHIFT_RESET;
#endif
/* load the new frequency dividers */ /* load the new frequency dividers */
set_frequency(freq); set_frequency(freq);
/* switch emi back to pll */ /* switch emi back to pll */
@ -180,7 +184,9 @@ void imx233_emi_set_frequency(unsigned long freq)
/* wait for transition */ /* wait for transition */
while(BF_RD(CLKCTRL_EMI, BUSY_REF_EMI)); while(BF_RD(CLKCTRL_EMI, BUSY_REF_EMI));
/* allow emi dll to lock again */ /* allow emi dll to lock again */
#if IMX233_SUBTARGET >= 3780
HW_EMI_CTRL_CLR = BM_EMI_CTRL_DLL_RESET | BM_EMI_CTRL_DLL_SHIFT_RESET; HW_EMI_CTRL_CLR = BM_EMI_CTRL_DLL_RESET | BM_EMI_CTRL_DLL_SHIFT_RESET;
#endif
/* wait for lock */ /* wait for lock */
while(!BF_RD(DRAM_CTL04, DLLLOCKREG)); while(!BF_RD(DRAM_CTL04, DLLLOCKREG));
/* get DRAM out of self-refresh mode */ /* get DRAM out of self-refresh mode */
@ -190,3 +196,4 @@ void imx233_emi_set_frequency(unsigned long freq)
restore_interrupt(oldstatus); restore_interrupt(oldstatus);
} }
#endif