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u-boot/arch/powerpc/cpu/mpc83xx/speed.c
York Sun d29d17d7ba powerpc/mpc83xx: Migrate from spd_sdram to unified DDR driver 
Unified DDR driver is maintained for better performance, robustness and bug
fixes. Upgrading to use unified DDR driver for MPC83xx takes advantage of
overall improvement. It requires changes for board files to customize
platform-dependent parameters.

To utilize the unified DDR driver, a board needs to define CONFIG_FSL_DDRx
in the header file. No more boards will be accepted without such definition.

Note: the workaround for erratum DDR6 for the very old MPC834x Rev 1.0/1.1
and MPC8360 Rev 1.1/1.2 parts is not migrated to unified driver.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-09-29 19:01:06 -05:00

570 lines
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/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <mpc83xx.h>
#include <command.h>
#include <asm/processor.h>
DECLARE_GLOBAL_DATA_PTR;
/* ----------------------------------------------------------------- */
typedef enum {
_unk,
_off,
_byp,
_x8,
_x4,
_x2,
_x1,
_1x,
_1_5x,
_2x,
_2_5x,
_3x
} mult_t;
typedef struct {
mult_t core_csb_ratio;
mult_t vco_divider;
} corecnf_t;
corecnf_t corecnf_tab[] = {
{_byp, _byp}, /* 0x00 */
{_byp, _byp}, /* 0x01 */
{_byp, _byp}, /* 0x02 */
{_byp, _byp}, /* 0x03 */
{_byp, _byp}, /* 0x04 */
{_byp, _byp}, /* 0x05 */
{_byp, _byp}, /* 0x06 */
{_byp, _byp}, /* 0x07 */
{_1x, _x2}, /* 0x08 */
{_1x, _x4}, /* 0x09 */
{_1x, _x8}, /* 0x0A */
{_1x, _x8}, /* 0x0B */
{_1_5x, _x2}, /* 0x0C */
{_1_5x, _x4}, /* 0x0D */
{_1_5x, _x8}, /* 0x0E */
{_1_5x, _x8}, /* 0x0F */
{_2x, _x2}, /* 0x10 */
{_2x, _x4}, /* 0x11 */
{_2x, _x8}, /* 0x12 */
{_2x, _x8}, /* 0x13 */
{_2_5x, _x2}, /* 0x14 */
{_2_5x, _x4}, /* 0x15 */
{_2_5x, _x8}, /* 0x16 */
{_2_5x, _x8}, /* 0x17 */
{_3x, _x2}, /* 0x18 */
{_3x, _x4}, /* 0x19 */
{_3x, _x8}, /* 0x1A */
{_3x, _x8}, /* 0x1B */
};
/* ----------------------------------------------------------------- */
/*
*
*/
int get_clocks(void)
{
volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
u32 pci_sync_in;
u8 spmf;
u8 clkin_div;
u32 sccr;
u32 corecnf_tab_index;
u8 corepll;
u32 lcrr;
u32 csb_clk;
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC834x) || defined(CONFIG_MPC837x)
u32 tsec1_clk;
u32 tsec2_clk;
u32 usbdr_clk;
#endif
#ifdef CONFIG_MPC834x
u32 usbmph_clk;
#endif
u32 core_clk;
u32 i2c1_clk;
#if !defined(CONFIG_MPC832x)
u32 i2c2_clk;
#endif
#if defined(CONFIG_MPC8315)
u32 tdm_clk;
#endif
#if defined(CONFIG_FSL_ESDHC)
u32 sdhc_clk;
#endif
u32 enc_clk;
u32 lbiu_clk;
u32 lclk_clk;
u32 mem_clk;
#if defined(CONFIG_MPC8360)
u32 mem_sec_clk;
#endif
#if defined(CONFIG_MPC8360) || defined(CONFIG_MPC832x)
u32 qepmf;
u32 qepdf;
u32 qe_clk;
u32 brg_clk;
#endif
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC837x)
u32 pciexp1_clk;
u32 pciexp2_clk;
#endif
#if defined(CONFIG_MPC837x) || defined(CONFIG_MPC8315)
u32 sata_clk;
#endif
if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32) im)
return -1;
clkin_div = ((im->clk.spmr & SPMR_CKID) >> SPMR_CKID_SHIFT);
if (im->reset.rcwh & HRCWH_PCI_HOST) {
#if defined(CONFIG_83XX_CLKIN)
pci_sync_in = CONFIG_83XX_CLKIN / (1 + clkin_div);
#else
pci_sync_in = 0xDEADBEEF;
#endif
} else {
#if defined(CONFIG_83XX_PCICLK)
pci_sync_in = CONFIG_83XX_PCICLK;
#else
pci_sync_in = 0xDEADBEEF;
#endif
}
spmf = (im->clk.spmr & SPMR_SPMF) >> SPMR_SPMF_SHIFT;
csb_clk = pci_sync_in * (1 + clkin_div) * spmf;
sccr = im->clk.sccr;
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC834x) || defined(CONFIG_MPC837x)
switch ((sccr & SCCR_TSEC1CM) >> SCCR_TSEC1CM_SHIFT) {
case 0:
tsec1_clk = 0;
break;
case 1:
tsec1_clk = csb_clk;
break;
case 2:
tsec1_clk = csb_clk / 2;
break;
case 3:
tsec1_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_TSEC1CM value */
return -2;
}
switch ((sccr & SCCR_USBDRCM) >> SCCR_USBDRCM_SHIFT) {
case 0:
usbdr_clk = 0;
break;
case 1:
usbdr_clk = csb_clk;
break;
case 2:
usbdr_clk = csb_clk / 2;
break;
case 3:
usbdr_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_USBDRCM value */
return -3;
}
#endif
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC8315) || \
defined(CONFIG_MPC834x) || defined(CONFIG_MPC837x)
switch ((sccr & SCCR_TSEC2CM) >> SCCR_TSEC2CM_SHIFT) {
case 0:
tsec2_clk = 0;
break;
case 1:
tsec2_clk = csb_clk;
break;
case 2:
tsec2_clk = csb_clk / 2;
break;
case 3:
tsec2_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_TSEC2CM value */
return -4;
}
#elif defined(CONFIG_MPC8313)
tsec2_clk = tsec1_clk;
if (!(sccr & SCCR_TSEC1ON))
tsec1_clk = 0;
if (!(sccr & SCCR_TSEC2ON))
tsec2_clk = 0;
#endif
#if defined(CONFIG_MPC834x)
switch ((sccr & SCCR_USBMPHCM) >> SCCR_USBMPHCM_SHIFT) {
case 0:
usbmph_clk = 0;
break;
case 1:
usbmph_clk = csb_clk;
break;
case 2:
usbmph_clk = csb_clk / 2;
break;
case 3:
usbmph_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_USBMPHCM value */
return -5;
}
if (usbmph_clk != 0 && usbdr_clk != 0 && usbmph_clk != usbdr_clk) {
/* if USB MPH clock is not disabled and
* USB DR clock is not disabled then
* USB MPH & USB DR must have the same rate
*/
return -6;
}
#endif
switch ((sccr & SCCR_ENCCM) >> SCCR_ENCCM_SHIFT) {
case 0:
enc_clk = 0;
break;
case 1:
enc_clk = csb_clk;
break;
case 2:
enc_clk = csb_clk / 2;
break;
case 3:
enc_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_ENCCM value */
return -7;
}
#if defined(CONFIG_FSL_ESDHC)
switch ((sccr & SCCR_SDHCCM) >> SCCR_SDHCCM_SHIFT) {
case 0:
sdhc_clk = 0;
break;
case 1:
sdhc_clk = csb_clk;
break;
case 2:
sdhc_clk = csb_clk / 2;
break;
case 3:
sdhc_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_SDHCCM value */
return -8;
}
#endif
#if defined(CONFIG_MPC8315)
switch ((sccr & SCCR_TDMCM) >> SCCR_TDMCM_SHIFT) {
case 0:
tdm_clk = 0;
break;
case 1:
tdm_clk = csb_clk;
break;
case 2:
tdm_clk = csb_clk / 2;
break;
case 3:
tdm_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_TDMCM value */
return -8;
}
#endif
#if defined(CONFIG_MPC834x)
i2c1_clk = tsec2_clk;
#elif defined(CONFIG_MPC8360)
i2c1_clk = csb_clk;
#elif defined(CONFIG_MPC832x)
i2c1_clk = enc_clk;
#elif defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x)
i2c1_clk = enc_clk;
#elif defined(CONFIG_FSL_ESDHC)
i2c1_clk = sdhc_clk;
#elif defined(CONFIG_MPC837x)
i2c1_clk = enc_clk;
#endif
#if !defined(CONFIG_MPC832x)
i2c2_clk = csb_clk; /* i2c-2 clk is equal to csb clk */
#endif
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC837x)
switch ((sccr & SCCR_PCIEXP1CM) >> SCCR_PCIEXP1CM_SHIFT) {
case 0:
pciexp1_clk = 0;
break;
case 1:
pciexp1_clk = csb_clk;
break;
case 2:
pciexp1_clk = csb_clk / 2;
break;
case 3:
pciexp1_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_PCIEXP1CM value */
return -9;
}
switch ((sccr & SCCR_PCIEXP2CM) >> SCCR_PCIEXP2CM_SHIFT) {
case 0:
pciexp2_clk = 0;
break;
case 1:
pciexp2_clk = csb_clk;
break;
case 2:
pciexp2_clk = csb_clk / 2;
break;
case 3:
pciexp2_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_PCIEXP2CM value */
return -10;
}
#endif
#if defined(CONFIG_MPC837x) || defined(CONFIG_MPC8315)
switch ((sccr & SCCR_SATA1CM) >> SCCR_SATA1CM_SHIFT) {
case 0:
sata_clk = 0;
break;
case 1:
sata_clk = csb_clk;
break;
case 2:
sata_clk = csb_clk / 2;
break;
case 3:
sata_clk = csb_clk / 3;
break;
default:
/* unkown SCCR_SATACM value */
return -11;
}
#endif
lbiu_clk = csb_clk *
(1 + ((im->clk.spmr & SPMR_LBIUCM) >> SPMR_LBIUCM_SHIFT));
lcrr = (im->im_lbc.lcrr & LCRR_CLKDIV) >> LCRR_CLKDIV_SHIFT;
switch (lcrr) {
case 2:
case 4:
case 8:
lclk_clk = lbiu_clk / lcrr;
break;
default:
/* unknown lcrr */
return -12;
}
mem_clk = csb_clk *
(1 + ((im->clk.spmr & SPMR_DDRCM) >> SPMR_DDRCM_SHIFT));
corepll = (im->clk.spmr & SPMR_COREPLL) >> SPMR_COREPLL_SHIFT;
#if defined(CONFIG_MPC8360)
mem_sec_clk = csb_clk * (1 +
((im->clk.spmr & SPMR_LBIUCM) >> SPMR_LBIUCM_SHIFT));
#endif
corecnf_tab_index = ((corepll & 0x1F) << 2) | ((corepll & 0x60) >> 5);
if (corecnf_tab_index > (sizeof(corecnf_tab) / sizeof(corecnf_t))) {
/* corecnf_tab_index is too high, possibly worng value */
return -11;
}
switch (corecnf_tab[corecnf_tab_index].core_csb_ratio) {
case _byp:
case _x1:
case _1x:
core_clk = csb_clk;
break;
case _1_5x:
core_clk = (3 * csb_clk) / 2;
break;
case _2x:
core_clk = 2 * csb_clk;
break;
case _2_5x:
core_clk = (5 * csb_clk) / 2;
break;
case _3x:
core_clk = 3 * csb_clk;
break;
default:
/* unkown core to csb ratio */
return -13;
}
#if defined(CONFIG_MPC8360) || defined(CONFIG_MPC832x)
qepmf = (im->clk.spmr & SPMR_CEPMF) >> SPMR_CEPMF_SHIFT;
qepdf = (im->clk.spmr & SPMR_CEPDF) >> SPMR_CEPDF_SHIFT;
qe_clk = (pci_sync_in * qepmf) / (1 + qepdf);
brg_clk = qe_clk / 2;
#endif
gd->csb_clk = csb_clk;
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC834x) || defined(CONFIG_MPC837x)
gd->tsec1_clk = tsec1_clk;
gd->tsec2_clk = tsec2_clk;
gd->usbdr_clk = usbdr_clk;
#endif
#if defined(CONFIG_MPC834x)
gd->usbmph_clk = usbmph_clk;
#endif
#if defined(CONFIG_MPC8315)
gd->tdm_clk = tdm_clk;
#endif
#if defined(CONFIG_FSL_ESDHC)
gd->sdhc_clk = sdhc_clk;
#endif
gd->core_clk = core_clk;
gd->i2c1_clk = i2c1_clk;
#if !defined(CONFIG_MPC832x)
gd->i2c2_clk = i2c2_clk;
#endif
gd->enc_clk = enc_clk;
gd->lbiu_clk = lbiu_clk;
gd->lclk_clk = lclk_clk;
gd->mem_clk = mem_clk;
#if defined(CONFIG_MPC8360)
gd->mem_sec_clk = mem_sec_clk;
#endif
#if defined(CONFIG_MPC8360) || defined(CONFIG_MPC832x)
gd->qe_clk = qe_clk;
gd->brg_clk = brg_clk;
#endif
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC837x)
gd->pciexp1_clk = pciexp1_clk;
gd->pciexp2_clk = pciexp2_clk;
#endif
#if defined(CONFIG_MPC837x) || defined(CONFIG_MPC8315)
gd->sata_clk = sata_clk;
#endif
gd->pci_clk = pci_sync_in;
gd->cpu_clk = gd->core_clk;
gd->bus_clk = gd->csb_clk;
return 0;
}
/********************************************
* get_bus_freq
* return system bus freq in Hz
*********************************************/
ulong get_bus_freq(ulong dummy)
{
return gd->csb_clk;
}
/********************************************
* get_ddr_freq
* return ddr bus freq in Hz
*********************************************/
ulong get_ddr_freq(ulong dummy)
{
return gd->mem_clk;
}
int do_clocks (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
char buf[32];
printf("Clock configuration:\n");
printf(" Core: %-4s MHz\n", strmhz(buf, gd->core_clk));
printf(" Coherent System Bus: %-4s MHz\n", strmhz(buf, gd->csb_clk));
#if defined(CONFIG_MPC8360) || defined(CONFIG_MPC832x)
printf(" QE: %-4s MHz\n", strmhz(buf, gd->qe_clk));
printf(" BRG: %-4s MHz\n", strmhz(buf, gd->brg_clk));
#endif
printf(" Local Bus Controller:%-4s MHz\n", strmhz(buf, gd->lbiu_clk));
printf(" Local Bus: %-4s MHz\n", strmhz(buf, gd->lclk_clk));
printf(" DDR: %-4s MHz\n", strmhz(buf, gd->mem_clk));
#if defined(CONFIG_MPC8360)
printf(" DDR Secondary: %-4s MHz\n", strmhz(buf, gd->mem_sec_clk));
#endif
printf(" SEC: %-4s MHz\n", strmhz(buf, gd->enc_clk));
printf(" I2C1: %-4s MHz\n", strmhz(buf, gd->i2c1_clk));
#if !defined(CONFIG_MPC832x)
printf(" I2C2: %-4s MHz\n", strmhz(buf, gd->i2c2_clk));
#endif
#if defined(CONFIG_MPC8315)
printf(" TDM: %-4s MHz\n", strmhz(buf, gd->tdm_clk));
#endif
#if defined(CONFIG_FSL_ESDHC)
printf(" SDHC: %-4s MHz\n", strmhz(buf, gd->sdhc_clk));
#endif
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC834x) || defined(CONFIG_MPC837x)
printf(" TSEC1: %-4s MHz\n", strmhz(buf, gd->tsec1_clk));
printf(" TSEC2: %-4s MHz\n", strmhz(buf, gd->tsec2_clk));
printf(" USB DR: %-4s MHz\n", strmhz(buf, gd->usbdr_clk));
#endif
#if defined(CONFIG_MPC834x)
printf(" USB MPH: %-4s MHz\n", strmhz(buf, gd->usbmph_clk));
#endif
#if defined(CONFIG_MPC8308) || defined(CONFIG_MPC831x) || \
defined(CONFIG_MPC837x)
printf(" PCIEXP1: %-4s MHz\n", strmhz(buf, gd->pciexp1_clk));
printf(" PCIEXP2: %-4s MHz\n", strmhz(buf, gd->pciexp2_clk));
#endif
#if defined(CONFIG_MPC837x) || defined(CONFIG_MPC8315)
printf(" SATA: %-4s MHz\n", strmhz(buf, gd->sata_clk));
#endif
return 0;
}
U_BOOT_CMD(clocks, 1, 0, do_clocks,
"print clock configuration",
" clocks"
);
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