Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-12 06:12:58 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/arch/m68k/cpu/mcf5445x/speed.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

280 lines
6.7 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
*
* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*/
#include <common.h>
#include <asm/processor.h>
#include <asm/immap.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Low Power Divider specifications
*/
#define CLOCK_LPD_MIN (1 << 0) /* Divider (decoded) */
#define CLOCK_LPD_MAX (1 << 15) /* Divider (decoded) */
#define CLOCK_PLL_FVCO_MAX 540000000
#define CLOCK_PLL_FVCO_MIN 300000000
#define CLOCK_PLL_FSYS_MAX 266666666
#define CLOCK_PLL_FSYS_MIN 100000000
#define MHZ 1000000
void clock_enter_limp(int lpdiv)
{
ccm_t *ccm = (ccm_t *)MMAP_CCM;
int i, j;
/* Check bounds of divider */
if (lpdiv < CLOCK_LPD_MIN)
lpdiv = CLOCK_LPD_MIN;
if (lpdiv > CLOCK_LPD_MAX)
lpdiv = CLOCK_LPD_MAX;
/* Round divider down to nearest power of two */
for (i = 0, j = lpdiv; j != 1; j >>= 1, i++) ;
#ifdef CONFIG_MCF5445x
/* Apply the divider to the system clock */
clrsetbits_be16(&ccm->cdr, 0x0f00, CCM_CDR_LPDIV(i));
#endif
/* Enable Limp Mode */
setbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);
}
/*
* brief Exit Limp mode
* warning The PLL should be set and locked prior to exiting Limp mode
*/
void clock_exit_limp(void)
{
ccm_t *ccm = (ccm_t *)MMAP_CCM;
pll_t *pll = (pll_t *)MMAP_PLL;
/* Exit Limp mode */
clrbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);
/* Wait for the PLL to lock */
while (!(in_be32(&pll->psr) & PLL_PSR_LOCK))
;
}
#ifdef CONFIG_MCF5441x
void setup_5441x_clocks(void)
{
ccm_t *ccm = (ccm_t *)MMAP_CCM;
pll_t *pll = (pll_t *)MMAP_PLL;
int temp, vco = 0, bootmod_ccr, pdr;
bootmod_ccr = (in_be16(&ccm->ccr) & CCM_CCR_BOOTMOD) >> 14;
switch (bootmod_ccr) {
case 0:
out_be32(&pll->pcr, 0x00000013);
out_be32(&pll->pdr, 0x00e70c61);
clock_exit_limp();
break;
case 2:
break;
case 3:
break;
}
/*Change frequency for Modelo SER1 USB host*/
#ifdef CONFIG_LOW_MCFCLK
temp = in_be32(&pll->pcr);
temp &= ~0x3f;
temp |= 5;
out_be32(&pll->pcr, temp);
temp = in_be32(&pll->pdr);
temp &= ~0x001f0000;
temp |= 0x00040000;
out_be32(&pll->pdr, temp);
__asm__("tpf");
#endif
setbits_be16(&ccm->misccr2, 0x02);
vco = ((in_be32(&pll->pcr) & PLL_CR_FBKDIV_BITS) + 1) *
CONFIG_SYS_INPUT_CLKSRC;
gd->arch.vco_clk = vco;
gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */
pdr = in_be32(&pll->pdr);
temp = (pdr & PLL_DR_OUTDIV1_BITS) + 1;
gd->cpu_clk = vco / temp; /* cpu clock */
gd->arch.flb_clk = vco / temp; /* FlexBus clock */
gd->arch.flb_clk >>= 1;
if (in_be16(&ccm->misccr2) & 2) /* fsys/4 */
gd->arch.flb_clk >>= 1;
temp = ((pdr & PLL_DR_OUTDIV2_BITS) >> 5) + 1;
gd->bus_clk = vco / temp; /* bus clock */
}
#endif
#ifdef CONFIG_MCF5445x
void setup_5445x_clocks(void)
{
ccm_t *ccm = (ccm_t *)MMAP_CCM;
pll_t *pll = (pll_t *)MMAP_PLL;
int pllmult_nopci[] = { 20, 10, 24, 18, 12, 6, 16, 8 };
int pllmult_pci[] = { 12, 6, 16, 8 };
int vco = 0, temp, fbtemp, pcrvalue;
int *pPllmult = NULL;
u16 fbpll_mask;
#ifdef CONFIG_PCI
int bPci;
#endif
#ifdef CONFIG_M54455EVB
u8 *cpld = (u8 *)(CONFIG_SYS_CS2_BASE + 3);
#endif
u8 bootmode;
/* To determine PCI is present or not */
if (((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x00e0) ||
((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x0060)) {
pPllmult = &pllmult_pci[0];
fbpll_mask = 3; /* 11b */
#ifdef CONFIG_PCI
bPci = 1;
#endif
} else {
pPllmult = &pllmult_nopci[0];
fbpll_mask = 7; /* 111b */
#ifdef CONFIG_PCI
gd->pci_clk = 0;
bPci = 0;
#endif
}
#ifdef CONFIG_M54455EVB
bootmode = (in_8(cpld) & 0x03);
if (bootmode != 3) {
/* Temporary read from CCR- fixed fb issue, must be the same clock
as pci or input clock, causing cpld/fpga read inconsistancy */
fbtemp = pPllmult[ccm->ccr & fbpll_mask];
/* Break down into small pieces, code still in flex bus */
pcrvalue = in_be32(&pll->pcr) & 0xFFFFF0FF;
temp = fbtemp - 1;
pcrvalue |= PLL_PCR_OUTDIV3(temp);
out_be32(&pll->pcr, pcrvalue);
}
#endif
#ifdef CONFIG_M54451EVB
/* No external logic to read the bootmode, hard coded from built */
#ifdef CONFIG_CF_SBF
bootmode = 3;
#else
bootmode = 2;
/* default value is 16 mul, set to 20 mul */
pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF) | 0x14000000;
out_be32(&pll->pcr, pcrvalue);
while ((in_be32(&pll->psr) & PLL_PSR_LOCK) != PLL_PSR_LOCK)
;
#endif
#endif
if (bootmode == 0) {
/* RCON mode */
vco = pPllmult[ccm->rcon & fbpll_mask] * CONFIG_SYS_INPUT_CLKSRC;
if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
/* invaild range, re-set in PCR */
int temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
int i, j, bus;
j = (in_be32(&pll->pcr) & 0xFF000000) >> 24;
for (i = j; i < 0xFF; i++) {
vco = i * CONFIG_SYS_INPUT_CLKSRC;
if (vco >= CLOCK_PLL_FVCO_MIN) {
bus = vco / temp;
if (bus <= CLOCK_PLL_FSYS_MIN - MHZ)
continue;
else
break;
}
}
pcrvalue = in_be32(&pll->pcr) & 0x00FF00FF;
fbtemp = ((i - 1) << 8) | ((i - 1) << 12);
pcrvalue |= ((i << 24) | fbtemp);
out_be32(&pll->pcr, pcrvalue);
}
gd->arch.vco_clk = vco; /* Vco clock */
} else if (bootmode == 2) {
/* Normal mode */
vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
/* Default value */
pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF);
pcrvalue |= pPllmult[in_be16(&ccm->ccr) & fbpll_mask] << 24;
out_be32(&pll->pcr, pcrvalue);
vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
}
gd->arch.vco_clk = vco; /* Vco clock */
} else if (bootmode == 3) {
/* serial mode */
vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
gd->arch.vco_clk = vco; /* Vco clock */
}
if ((in_be16(&ccm->ccr) & CCM_MISCCR_LIMP) == CCM_MISCCR_LIMP) {
/* Limp mode */
} else {
gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */
temp = (in_be32(&pll->pcr) & PLL_PCR_OUTDIV1_MASK) + 1;
gd->cpu_clk = vco / temp; /* cpu clock */
temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
gd->bus_clk = vco / temp; /* bus clock */
temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV3_MASK) >> 8) + 1;
gd->arch.flb_clk = vco / temp; /* FlexBus clock */
#ifdef CONFIG_PCI
if (bPci) {
temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV4_MASK) >> 12) + 1;
gd->pci_clk = vco / temp; /* PCI clock */
}
#endif
}
#ifdef CONFIG_SYS_I2C_FSL
gd->arch.i2c1_clk = gd->bus_clk;
#endif
}
#endif
/* get_clocks() fills in gd->cpu_clock and gd->bus_clk */
int get_clocks(void)
{
#ifdef CONFIG_MCF5441x
setup_5441x_clocks();
#endif
#ifdef CONFIG_MCF5445x
setup_5445x_clocks();
#endif
#ifdef CONFIG_SYS_FSL_I2C
gd->arch.i2c1_clk = gd->bus_clk;
#endif
return (0);
}
Reference in a new issue View git blame Copy permalink