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imx233: rewrite clkctrl using new register headers

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Change-Id: I6c79e99ed4ab20e00c3110d870e144a6c8596769
This commit is contained in:
Amaury Pouly 2013-06-16 15:28:04 +02:00
parent f545908c16
commit 2a01b3766f
4 changed files with 98 additions and 218 deletions
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203
firmware/target/arm/imx233/clkctrl-imx233.c
View file

@ -26,9 +26,9 @@
void imx233_clkctrl_enable_xtal(enum imx233_xtal_clk_t xtal_clk, bool enable)
{
if(enable)
__REG_CLR(HW_CLKCTRL_XTAL) = xtal_clk;
HW_CLKCTRL_XTAL_CLR = xtal_clk;
else
__REG_SET(HW_CLKCTRL_XTAL) = xtal_clk;
HW_CLKCTRL_XTAL_SET = xtal_clk;
}
bool imx233_clkctrl_is_xtal_enable(enum imx233_xtal_clk_t clk)
@ -38,78 +38,49 @@ bool imx233_clkctrl_is_xtal_enable(enum imx233_xtal_clk_t clk)
void imx233_clkctrl_enable_clock(enum imx233_clock_t clk, bool enable)
{
volatile uint32_t *REG;
bool gate = !enable;
switch(clk)
{
case CLK_PIX: REG = &HW_CLKCTRL_PIX; break;
case CLK_SSP: REG = &HW_CLKCTRL_SSP; break;
case CLK_PIX: BF_WR(CLKCTRL_PIX, CLKGATE, gate); break;
case CLK_SSP: BF_WR(CLKCTRL_SSP, CLKGATE, gate); break;
case CLK_PLL:
{
/* pll is a special case */
if(enable)
{
__REG_SET(HW_CLKCTRL_PLLCTRL0) = HW_CLKCTRL_PLLCTRL0__POWER;
while(!(HW_CLKCTRL_PLLCTRL1 & HW_CLKCTRL_PLLCTRL1__LOCK));
BF_SET(CLKCTRL_PLLCTRL0, POWER);
while(!BF_RD(CLKCTRL_PLLCTRL1, LOCK));
}
else
__REG_CLR(HW_CLKCTRL_PLLCTRL0) = HW_CLKCTRL_PLLCTRL0__POWER;
return;
}
default: return;
}
/* warning: some registers like HW_CLKCTRL_PIX don't have a CLR/SET variant ! */
if(enable)
{
*REG = (*REG) & ~__CLK_CLKGATE;
while((*REG) & __CLK_CLKGATE);
while((*REG) & __CLK_BUSY);
}
else
{
*REG |= __CLK_CLKGATE;
while(!((*REG) & __CLK_CLKGATE));
BF_CLR(CLKCTRL_PLLCTRL0, POWER);
break;
default:
break;
}
}
bool imx233_clkctrl_is_clock_enabled(enum imx233_clock_t clk)
{
volatile uint32_t *REG;
switch(clk)
{
case CLK_PLL: return HW_CLKCTRL_PLLCTRL0 & HW_CLKCTRL_PLLCTRL0__POWER;
case CLK_PIX: REG = &HW_CLKCTRL_PIX; break;
case CLK_SSP: REG = &HW_CLKCTRL_SSP; break;
case CLK_PLL: return BF_RD(CLKCTRL_PLLCTRL0, POWER);
case CLK_PIX: return !BF_RD(CLKCTRL_PIX, CLKGATE);
case CLK_SSP: return !BF_RD(CLKCTRL_SSP, CLKGATE);
default: return true;
}
return !((*REG) & __CLK_CLKGATE);
}
void imx233_clkctrl_set_clock_divisor(enum imx233_clock_t clk, int div)
{
/* warning: some registers like HW_CLKCTRL_PIX don't have a CLR/SET variant ! */
/* warning: some registers like HW_CLKCTRL_PIX don't have a CLR/SET variant !
* assume that we always derive emi and cpu from ref_XX */
switch(clk)
{
case CLK_PIX:
__FIELD_SET(HW_CLKCTRL_PIX, DIV, div);
break;
case CLK_SSP:
__FIELD_SET(HW_CLKCTRL_SSP, DIV, div);
break;
case CLK_CPU:
__FIELD_SET(HW_CLKCTRL_CPU, DIV_CPU, div);
break;
case CLK_EMI:
__FIELD_SET(HW_CLKCTRL_EMI, DIV_EMI, div);
break;
case CLK_HBUS:
/* disable frac enable at the same time */
HW_CLKCTRL_HBUS = div << HW_CLKCTRL_HBUS__DIV_BP |
(HW_CLKCTRL_HBUS & ~(HW_CLKCTRL_HBUS__DIV_FRAC_EN | HW_CLKCTRL_HBUS__DIV_BM));
break;
case CLK_XBUS:
__FIELD_SET(HW_CLKCTRL_XBUS, DIV, div);
break;
case CLK_PIX: BF_WR(CLKCTRL_PIX, DIV, div); break;
case CLK_CPU: BF_WR(CLKCTRL_CPU, DIV_CPU, div); break;
case CLK_EMI: BF_WR(CLKCTRL_EMI, DIV_EMI, div); break;
case CLK_SSP: BF_WR(CLKCTRL_SSP, DIV, div); break;
case CLK_HBUS: BF_WR(CLKCTRL_HBUS, DIV, div); break;
case CLK_XBUS: BF_WR(CLKCTRL_XBUS, DIV, div); break;
default: return;
}
}
@ -118,66 +89,54 @@ int imx233_clkctrl_get_clock_divisor(enum imx233_clock_t clk)
{
switch(clk)
{
case CLK_PIX: return __XTRACT(HW_CLKCTRL_PIX, DIV);
case CLK_SSP: return __XTRACT(HW_CLKCTRL_SSP, DIV);
case CLK_CPU: return __XTRACT(HW_CLKCTRL_CPU, DIV_CPU);
case CLK_EMI: return __XTRACT(HW_CLKCTRL_EMI, DIV_EMI);
case CLK_HBUS:
if(HW_CLKCTRL_HBUS & HW_CLKCTRL_HBUS__DIV_FRAC_EN)
return 0;
else
return __XTRACT(HW_CLKCTRL_HBUS, DIV);
case CLK_XBUS: return __XTRACT(HW_CLKCTRL_XBUS, DIV);
case CLK_PIX: return BF_RD(CLKCTRL_PIX, DIV);
case CLK_CPU: return BF_RD(CLKCTRL_CPU, DIV_CPU);
case CLK_EMI: return BF_RD(CLKCTRL_EMI, DIV_EMI);
case CLK_SSP: return BF_RD(CLKCTRL_SSP, DIV);
case CLK_HBUS: return BF_RD(CLKCTRL_HBUS, DIV);
case CLK_XBUS: return BF_RD(CLKCTRL_XBUS, DIV);
default: return 0;
}
}
void imx233_clkctrl_set_fractional_divisor(enum imx233_clock_t clk, int fracdiv)
{
/* NOTE: HW_CLKCTRL_FRAC only support byte access ! */
volatile uint8_t *REG;
#define handle_frac(dev) \
case CLK_##dev: \
if(fracdiv == 0) \
BF_SET(CLKCTRL_FRAC, CLKGATE##dev); \
else { \
BF_WR(CLKCTRL_FRAC, dev##FRAC, fracdiv); \
BF_CLR(CLKCTRL_FRAC, CLKGATE##dev); } \
break;
switch(clk)
{
case CLK_HBUS:
/* set frac enable at the same time */
HW_CLKCTRL_HBUS = fracdiv << HW_CLKCTRL_HBUS__DIV_BP | HW_CLKCTRL_HBUS__DIV_FRAC_EN |
(HW_CLKCTRL_HBUS & ~HW_CLKCTRL_HBUS__DIV_BM);
return;
case CLK_PIX: REG = &HW_CLKCTRL_FRAC_PIX; break;
case CLK_IO: REG = &HW_CLKCTRL_FRAC_IO; break;
case CLK_CPU: REG = &HW_CLKCTRL_FRAC_CPU; break;
case CLK_EMI: REG = &HW_CLKCTRL_FRAC_EMI; break;
default: return;
handle_frac(PIX)
handle_frac(IO)
handle_frac(CPU)
handle_frac(EMI)
default: break;
}
if(fracdiv != 0)
*REG = fracdiv;
else
*REG = HW_CLKCTRL_FRAC_XX__CLKGATEXX;
#undef handle_frac
}
int imx233_clkctrl_get_fractional_divisor(enum imx233_clock_t clk)
{
/* NOTE: HW_CLKCTRL_FRAC only support byte access ! */
volatile uint8_t *REG;
#define handle_frac(dev) \
case CLK_##dev:\
if(BF_RD(CLKCTRL_FRAC, CLKGATE##dev)) \
return 0; \
else \
return BF_RD(CLKCTRL_FRAC, dev##FRAC);
switch(clk)
{
case CLK_HBUS:
if(HW_CLKCTRL_HBUS & HW_CLKCTRL_HBUS__DIV_FRAC_EN)
return __XTRACT(HW_CLKCTRL_HBUS, DIV);
else
return 0;
case CLK_PIX: REG = &HW_CLKCTRL_FRAC_PIX; break;
case CLK_IO: REG = &HW_CLKCTRL_FRAC_IO; break;
case CLK_CPU: REG = &HW_CLKCTRL_FRAC_CPU; break;
case CLK_EMI: REG = &HW_CLKCTRL_FRAC_EMI; break;
handle_frac(PIX)
handle_frac(IO)
handle_frac(CPU)
handle_frac(EMI)
default: return 0;
}
if((*REG) & HW_CLKCTRL_FRAC_XX__CLKGATEXX)
return 0;
else
return *REG & ~HW_CLKCTRL_FRAC_XX__XX_STABLE;
#undef handle_frac
}
void imx233_clkctrl_set_bypass_pll(enum imx233_clock_t clk, bool bypass)
@ -185,45 +144,42 @@ void imx233_clkctrl_set_bypass_pll(enum imx233_clock_t clk, bool bypass)
uint32_t msk;
switch(clk)
{
case CLK_PIX: msk = HW_CLKCTRL_CLKSEQ__BYPASS_PIX; break;
case CLK_SSP: msk = HW_CLKCTRL_CLKSEQ__BYPASS_SSP; break;
case CLK_CPU: msk = HW_CLKCTRL_CLKSEQ__BYPASS_CPU; break;
case CLK_EMI: msk = HW_CLKCTRL_CLKSEQ__BYPASS_EMI; break;
case CLK_PIX: msk = BM_CLKCTRL_CLKSEQ_BYPASS_PIX; break;
case CLK_SSP: msk = BM_CLKCTRL_CLKSEQ_BYPASS_SSP; break;
case CLK_CPU: msk = BM_CLKCTRL_CLKSEQ_BYPASS_CPU; break;
case CLK_EMI: msk = BM_CLKCTRL_CLKSEQ_BYPASS_EMI; break;
default: return;
}
if(bypass)
__REG_SET(HW_CLKCTRL_CLKSEQ) = msk;
HW_CLKCTRL_CLKSEQ_SET = msk;
else
__REG_CLR(HW_CLKCTRL_CLKSEQ) = msk;
HW_CLKCTRL_CLKSEQ_CLR = msk;
}
bool imx233_clkctrl_get_bypass_pll(enum imx233_clock_t clk)
{
uint32_t msk;
switch(clk)
{
case CLK_PIX: msk = HW_CLKCTRL_CLKSEQ__BYPASS_PIX; break;
case CLK_SSP: msk = HW_CLKCTRL_CLKSEQ__BYPASS_SSP; break;
case CLK_CPU: msk = HW_CLKCTRL_CLKSEQ__BYPASS_CPU; break;
case CLK_EMI: msk = HW_CLKCTRL_CLKSEQ__BYPASS_EMI; break;
case CLK_PIX: return BF_RD(CLKCTRL_CLKSEQ, BYPASS_PIX);
case CLK_SSP: return BF_RD(CLKCTRL_CLKSEQ, BYPASS_SSP);
case CLK_CPU: return BF_RD(CLKCTRL_CLKSEQ, BYPASS_CPU);
case CLK_EMI: return BF_RD(CLKCTRL_CLKSEQ, BYPASS_EMI);
default: return false;
}
return HW_CLKCTRL_CLKSEQ & msk;
}
void imx233_clkctrl_enable_usb_pll(bool enable)
{
if(enable)
__REG_SET(HW_CLKCTRL_PLLCTRL0) = HW_CLKCTRL_PLLCTRL0__EN_USB_CLKS;
BF_SET(CLKCTRL_PLLCTRL0, EN_USB_CLKS);
else
__REG_CLR(HW_CLKCTRL_PLLCTRL0) = HW_CLKCTRL_PLLCTRL0__EN_USB_CLKS;
BF_CLR(CLKCTRL_PLLCTRL0, EN_USB_CLKS);
}
bool imx233_clkctrl_is_usb_pll_enabled(void)
{
return HW_CLKCTRL_PLLCTRL0 & HW_CLKCTRL_PLLCTRL0__EN_USB_CLKS;
return BF_RD(CLKCTRL_PLLCTRL0, EN_USB_CLKS);
}
void imx233_clkctrl_set_auto_slow_divisor(enum imx233_as_div_t div)
@ -231,34 +187,31 @@ void imx233_clkctrl_set_auto_slow_divisor(enum imx233_as_div_t div)
/* the SLOW_DIV must only be set when auto-slow is disabled */
bool old_status = imx233_clkctrl_is_auto_slow_enabled();
imx233_clkctrl_enable_auto_slow(false);
__FIELD_SET(HW_CLKCTRL_HBUS, SLOW_DIV, div);
BF_WR(CLKCTRL_HBUS, SLOW_DIV, div);
imx233_clkctrl_enable_auto_slow(old_status);
}
enum imx233_as_div_t imx233_clkctrl_get_auto_slow_divisor(void)
{
return __XTRACT(HW_CLKCTRL_HBUS, SLOW_DIV);
return BF_RD(CLKCTRL_HBUS, SLOW_DIV);
}
void imx233_clkctrl_enable_auto_slow(bool enable)
{
if(enable)
__REG_SET(HW_CLKCTRL_HBUS) = HW_CLKCTRL_HBUS__AUTO_SLOW_MODE;
else
__REG_CLR(HW_CLKCTRL_HBUS) = HW_CLKCTRL_HBUS__AUTO_SLOW_MODE;
BF_WR(CLKCTRL_HBUS, AUTO_SLOW_MODE, enable);
}
bool imx233_clkctrl_is_auto_slow_enabled(void)
{
return HW_CLKCTRL_HBUS & HW_CLKCTRL_HBUS__AUTO_SLOW_MODE;
return BF_RD(CLKCTRL_HBUS, AUTO_SLOW_MODE);
}
void imx233_clkctrl_enable_auto_slow_monitor(enum imx233_as_monitor_t monitor, bool enable)
{
if(enable)
__REG_SET(HW_CLKCTRL_HBUS) = monitor;
HW_CLKCTRL_HBUS_SET = monitor;
else
__REG_CLR(HW_CLKCTRL_HBUS) = monitor;
HW_CLKCTRL_HBUS_CLR = monitor;
}
bool imx233_clkctrl_is_auto_slow_monitor_enabled(enum imx233_as_monitor_t monitor)
@ -268,7 +221,7 @@ bool imx233_clkctrl_is_auto_slow_monitor_enabled(enum imx233_as_monitor_t monito
bool imx233_clkctrl_is_emi_sync_enabled(void)
{
return !!(HW_CLKCTRL_EMI & HW_CLKCTRL_EMI__SYNC_MODE_EN);
return BF_RD(CLKCTRL_EMI, SYNC_MODE_EN);
}
unsigned imx233_clkctrl_get_clock_freq(enum imx233_clock_t clk)
@ -289,9 +242,9 @@ unsigned imx233_clkctrl_get_clock_freq(enum imx233_clock_t clk)
{
ref = imx233_clkctrl_get_clock_freq(CLK_XTAL);
/* Integer divide mode vs fractional divide mode */
if(HW_CLKCTRL_CPU & HW_CLKCTRL_CPU__DIV_XTAL_FRAC_EN)
if(BF_RD(CLKCTRL_CPU, DIV_XTAL_FRAC_EN))
return (ref * __XTRACT(HW_CLKCTRL_CPU, DIV_XTAL)) / 32;
return (ref * BF_RD(CLKCTRL_CPU, DIV_XTAL)) / 32;
else
return ref / imx233_clkctrl_get_clock_divisor(CLK_CPU);
}
@ -357,10 +310,10 @@ unsigned imx233_clkctrl_get_clock_freq(enum imx233_clock_t clk)
if(imx233_clkctrl_get_bypass_pll(CLK_EMI))
{
ref = imx233_clkctrl_get_clock_freq(CLK_XTAL);
if(HW_CLKCTRL_EMI & HW_CLKCTRL_EMI__CLKGATE)
if(BF_RD(CLKCTRL_EMI, CLKGATE))
return 0;
else
return ref / __XTRACT(HW_CLKCTRL_EMI, DIV_XTAL);
return ref / BF_RD(CLKCTRL_EMI, DIV_XTAL);
}
else
{

83
firmware/target/arm/imx233/clkctrl-imx233.h
View file

@ -25,92 +25,15 @@
#include "system.h"
#include "cpu.h"
#define HW_CLKCTRL_BASE 0x80040000
#define HW_CLKCTRL_PLLCTRL0 (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x0))
#define HW_CLKCTRL_PLLCTRL0__POWER (1 << 16)
#define HW_CLKCTRL_PLLCTRL0__EN_USB_CLKS (1 << 18)
#define HW_CLKCTRL_PLLCTRL0__DIV_SEL_BP 20
#define HW_CLKCTRL_PLLCTRL0__DIV_SEL_BM (3 << 20)
#define HW_CLKCTRL_PLLCTRL1 (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x10))
#define HW_CLKCTRL_PLLCTRL1__LOCK (1 << 31)
#define HW_CLKCTRL_CPU (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x20))
#define HW_CLKCTRL_CPU__DIV_CPU_BP 0
#define HW_CLKCTRL_CPU__DIV_CPU_BM 0x3f
#define HW_CLKCTRL_CPU__INTERRUPT_WAIT (1 << 12)
#define HW_CLKCTRL_CPU__DIV_XTAL_BP 16
#define HW_CLKCTRL_CPU__DIV_XTAL_BM (0x3ff << 16)
#define HW_CLKCTRL_CPU__DIV_XTAL_FRAC_EN (1 << 26)
#define HW_CLKCTRL_CPU__BUSY_REF_CPU (1 << 28)
#define HW_CLKCTRL_HBUS (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x30))
#define HW_CLKCTRL_HBUS__DIV_BP 0
#define HW_CLKCTRL_HBUS__DIV_BM 0x1f
#define HW_CLKCTRL_HBUS__DIV_FRAC_EN (1 << 5)
#define HW_CLKCTRL_HBUS__SLOW_DIV_BP 16
#define HW_CLKCTRL_HBUS__SLOW_DIV_BM (0x7 << 16)
#define HW_CLKCTRL_HBUS__AUTO_SLOW_MODE (1 << 20)
/* warning: this register doesn't have a CLR/SET variant ! */
#define HW_CLKCTRL_XBUS (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x40))
#define HW_CLKCTRL_XBUS__DIV_BP 0
#define HW_CLKCTRL_XBUS__DIV_BM 0x3ff
#define HW_CLKCTRL_XBUS__BUSY (1 << 31)
#define HW_CLKCTRL_XTAL (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x50))
#define HW_CLKCTRL_XTAL__TIMROT_CLK32K_GATE (1 << 26)
#define HW_CLKCTRL_XTAL__DRI_CLK24M_GATE (1 << 28)
#define HW_CLKCTRL_XTAL__FILT_CLK24M_GATE (1 << 30)
/* warning: this register doesn't have a CLR/SET variant ! */
#define HW_CLKCTRL_PIX (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x60))
#define HW_CLKCTRL_PIX__DIV_BP 0
#define HW_CLKCTRL_PIX__DIV_BM 0xfff
/* warning: this register doesn't have a CLR/SET variant ! */
#define HW_CLKCTRL_SSP (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x70))
#define HW_CLKCTRL_SSP__DIV_BP 0
#define HW_CLKCTRL_SSP__DIV_BM 0x1ff
/* warning: this register doesn't have a CLR/SET variant ! */
#define HW_CLKCTRL_EMI (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0xa0))
#define HW_CLKCTRL_EMI__DIV_EMI_BP 0
#define HW_CLKCTRL_EMI__DIV_EMI_BM 0x3f
#define HW_CLKCTRL_EMI__DIV_XTAL_BP 8
#define HW_CLKCTRL_EMI__DIV_XTAL_BM (0xf << 8)
#define HW_CLKCTRL_EMI__BUSY_REF_EMI (1 << 28)
#define HW_CLKCTRL_EMI__BUSY_REF_XTAL (1 << 29)
#define HW_CLKCTRL_EMI__SYNC_MODE_EN (1 << 30)
#define HW_CLKCTRL_EMI__CLKGATE (1 << 31)
#define HW_CLKCTRL_CLKSEQ (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x110))
#define HW_CLKCTRL_CLKSEQ__BYPASS_PIX (1 << 1)
#define HW_CLKCTRL_CLKSEQ__BYPASS_SSP (1 << 5)
#define HW_CLKCTRL_CLKSEQ__BYPASS_EMI (1 << 6)
#define HW_CLKCTRL_CLKSEQ__BYPASS_CPU (1 << 7)
#define HW_CLKCTRL_FRAC (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0xf0))
#define HW_CLKCTRL_FRAC_CPU (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf0))
#define HW_CLKCTRL_FRAC_EMI (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf1))
#define HW_CLKCTRL_FRAC_PIX (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf2))
#define HW_CLKCTRL_FRAC_IO (*(volatile uint8_t *)(HW_CLKCTRL_BASE + 0xf3))
#define HW_CLKCTRL_FRAC_XX__XXDIV_BM 0x3f
#define HW_CLKCTRL_FRAC_XX__XX_STABLE (1 << 6)
#define HW_CLKCTRL_FRAC_XX__CLKGATEXX (1 << 7)
/* warning: this register doesn't have a CLR/SET variant ! */
#define HW_CLKCTRL_RESET (*(volatile uint32_t *)(HW_CLKCTRL_BASE + 0x120))
#define HW_CLKCTRL_RESET_CHIP 0x2
#define HW_CLKCTRL_RESET_DIG 0x1
#include "regs/regs-clkctrl.h"
static inline void core_sleep(void)
{
__REG_SET(HW_CLKCTRL_CPU) = HW_CLKCTRL_CPU__INTERRUPT_WAIT;
BF_WR(CLKCTRL_CPU, INTERRUPT_WAIT, 1);
asm volatile (
"mcr p15, 0, %0, c7, c0, 4 \n" /* Wait for interrupt */
"nop\n" /* Datasheet unclear: "The lr sent to handler points here after RTI"*/
"nop\n"
: : "r"(0)
);
enable_irq();

28
firmware/target/arm/imx233/emi-imx233.c
View file

@ -91,33 +91,37 @@ static void set_frequency(unsigned long freq) ICODE_ATTR;
static void set_frequency(unsigned long freq)
{
/* Set divider and clear clkgate. Do byte access to register to avoid bothering
* with other PFDs */
/** WARNING all restriction of imx233_emi_set_frequency apply here !! */
/* Set divider and clear clkgate. */
unsigned fracdiv;
unsigned div;
switch(freq)
{
case IMX233_EMIFREQ_151_MHz:
/* clk_emi@ref_emi/3*18/19 */
HW_CLKCTRL_FRAC_EMI = 19;
__FIELD_SET(HW_CLKCTRL_EMI, DIV_EMI, 3);
fracdiv = 19;
div = 3;
/* ref_emi@480 MHz
* clk_emi@151.58 MHz */
break;
case IMX233_EMIFREQ_130_MHz:
/* clk_emi@ref_emi/2*18/33 */
HW_CLKCTRL_FRAC_EMI = 33;
__FIELD_SET(HW_CLKCTRL_EMI, DIV_EMI, 2);
fracdiv = 33;
div = 2;
/* ref_emi@480 MHz
* clk_emi@130.91 MHz */
break;
case IMX233_EMIFREQ_64_MHz:
default:
/* clk_emi@ref_emi/5*18/27 */
HW_CLKCTRL_FRAC_EMI = 27;
__FIELD_SET(HW_CLKCTRL_EMI, DIV_EMI, 5);
fracdiv = 27;
div = 5;
/* ref_emi@480 MHz
* clk_emi@64 MHz */
break;
}
BF_WR(CLKCTRL_FRAC, EMIFRAC, fracdiv);
BF_WR(CLKCTRL_EMI, DIV_EMI, div);
}
void imx233_emi_set_frequency(unsigned long freq) ICODE_ATTR;
@ -162,17 +166,17 @@ void imx233_emi_set_frequency(unsigned long freq)
HW_DRAM_CTLxx(regs->index) = regs->value;
while((regs++)->index != 40);
/* switch emi to xtal */
__REG_SET(HW_CLKCTRL_CLKSEQ) = HW_CLKCTRL_CLKSEQ__BYPASS_EMI;
BF_SET(CLKCTRL_CLKSEQ, BYPASS_EMI);
/* wait for transition */
while(HW_CLKCTRL_EMI & HW_CLKCTRL_EMI__BUSY_REF_XTAL);
while(BF_RD(CLKCTRL_EMI, BUSY_REF_XTAL));
/* put emi dll into reset mode */
__REG_SET(HW_EMI_CTRL) = HW_EMI_CTRL__DLL_RESET | HW_EMI_CTRL__DLL_SHIFT_RESET;
/* load the new frequency dividers */
set_frequency(freq);
/* switch emi back to pll */
__REG_CLR(HW_CLKCTRL_CLKSEQ) = HW_CLKCTRL_CLKSEQ__BYPASS_EMI;
BF_CLR(CLKCTRL_CLKSEQ, BYPASS_EMI);
/* wait for transition */
while(HW_CLKCTRL_EMI & HW_CLKCTRL_EMI__BUSY_REF_EMI);
while(BF_RD(CLKCTRL_EMI, BUSY_REF_EMI));
/* allow emi dll to lock again */
__REG_CLR(HW_EMI_CTRL) = HW_EMI_CTRL__DLL_RESET | HW_EMI_CTRL__DLL_SHIFT_RESET;
/* wait for lock */

2
firmware/target/arm/imx233/system-imx233.c
View file

@ -44,7 +44,7 @@
void imx233_chip_reset(void)
{
HW_CLKCTRL_RESET = HW_CLKCTRL_RESET_CHIP;
HW_CLKCTRL_RESET = BM_CLKCTRL_RESET_CHIP;
}
void system_reboot(void)