diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc83xx/speed.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc83xx/speed.c | 549 |
1 files changed, 549 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc83xx/speed.c b/arch/powerpc/cpu/mpc83xx/speed.c new file mode 100644 index 0000000..bde7e92 --- /dev/null +++ b/arch/powerpc/cpu/mpc83xx/speed.c @@ -0,0 +1,549 @@ +/* + * (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_MPC834x) || defined(CONFIG_MPC831x) || 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_MPC837x) + 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_MPC837x) || defined(CONFIG_MPC831x) + 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->reset.rcwl & HRCWL_SPMF) >> HRCWL_SPMF_SHIFT); + csb_clk = pci_sync_in * (1 + clkin_div) * spmf; + + sccr = im->clk.sccr; + +#if defined(CONFIG_MPC834x) || defined(CONFIG_MPC831x) || 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_MPC834x) || defined(CONFIG_MPC837x) || defined(CONFIG_MPC8315) + 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_MPC837x) + 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_MPC831x) + i2c1_clk = enc_clk; +#elif defined(CONFIG_MPC837x) + i2c1_clk = sdhc_clk; +#endif +#if !defined(CONFIG_MPC832x) + i2c2_clk = csb_clk; /* i2c-2 clk is equal to csb clk */ +#endif + +#if defined(CONFIG_MPC837x) || defined(CONFIG_MPC831x) + 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->reset.rcwl & HRCWL_LBIUCM) >> HRCWL_LBIUCM_SHIFT)); + lcrr = (im->lbus.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->reset.rcwl & HRCWL_DDRCM) >> HRCWL_DDRCM_SHIFT)); + corepll = (im->reset.rcwl & HRCWL_COREPLL) >> HRCWL_COREPLL_SHIFT; +#if defined(CONFIG_MPC8360) + mem_sec_clk = csb_clk * (1 + + ((im->reset.rcwl & HRCWL_LBIUCM) >> HRCWL_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->reset.rcwl & HRCWL_CEPMF) >> HRCWL_CEPMF_SHIFT; + qepdf = (im->reset.rcwl & HRCWL_CEPDF) >> HRCWL_CEPDF_SHIFT; + qe_clk = (pci_sync_in * qepmf) / (1 + qepdf); + brg_clk = qe_clk / 2; +#endif + + gd->csb_clk = csb_clk; +#if defined(CONFIG_MPC834x) || defined(CONFIG_MPC831x) || 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_MPC837x) + 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_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; +} + +int do_clocks (cmd_tbl_t * cmdtp, int flag, int argc, char *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_MPC837x) + printf(" SDHC: %-4s MHz\n", strmhz(buf, gd->sdhc_clk)); +#endif +#if defined(CONFIG_MPC834x) || defined(CONFIG_MPC831x) || 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_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" +); |