X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=cpu%2Fmpc86xx%2Fspeed.c;h=da5b58b73f29441761d0abd430f8d1f19a879103;hb=dbab0691d2533560f7e91b92ae844046a9ad1df3;hp=0f5a6388ce11cdbeb8badb80a1b0be803e53d502;hpb=debb7354d1ea4f694154818df5e5b523f5c1cc1d;p=u-boot diff --git a/cpu/mpc86xx/speed.c b/cpu/mpc86xx/speed.c index 0f5a6388ce..da5b58b73f 100644 --- a/cpu/mpc86xx/speed.c +++ b/cpu/mpc86xx/speed.c @@ -1,6 +1,6 @@ /* * Copyright 2004 Freescale Semiconductor. - * Jeff Brown (jeffrey@freescale.com) + * Jeff Brown * Srikanth Srinivasan (srikanth.srinivasan@freescale.com) * * (C) Copyright 2000-2002 @@ -29,23 +29,22 @@ #include #include -unsigned long get_board_sys_clk(ulong dummy); -unsigned long get_sysclk_from_px_regs(void); +DECLARE_GLOBAL_DATA_PTR; +/* used in some defintiions of CONFIG_SYS_CLK_FREQ */ +extern unsigned long get_board_sys_clk(unsigned long dummy); -/* --------------------------------------------------------------- */ - -void get_sys_info (sys_info_t * sysInfo) +void get_sys_info(sys_info_t *sysInfo) { - volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile immap_t *immap = (immap_t *) CFG_IMMR; volatile ccsr_gur_t *gur = &immap->im_gur; uint plat_ratio, e600_ratio; - plat_ratio = (gur->porpllsr) & 0x0000003e; + plat_ratio = (gur->porpllsr) & 0x0000003e; plat_ratio >>= 1; - - switch(plat_ratio) { - case 0x0: + + switch (plat_ratio) { + case 0x0: sysInfo->freqSystemBus = 16 * CONFIG_SYS_CLK_FREQ; break; case 0x02: @@ -57,192 +56,89 @@ void get_sys_info (sys_info_t * sysInfo) case 0x09: case 0x0a: case 0x0c: - case 0x10: - sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ; - break; + case 0x10: + sysInfo->freqSystemBus = plat_ratio * CONFIG_SYS_CLK_FREQ; + break; default: - sysInfo->freqSystemBus = 0; + sysInfo->freqSystemBus = 0; break; } - // printf("assigned system bus freq = %d for plat ratio 0x%08lx\n", sysInfo->freqSystemBus, plat_ratio); e600_ratio = (gur->porpllsr) & 0x003f0000; e600_ratio >>= 16; - switch(e600_ratio) { + + switch (e600_ratio) { case 0x10: - sysInfo->freqProcessor = 2*sysInfo->freqSystemBus; + sysInfo->freqProcessor = 2 * sysInfo->freqSystemBus; break; - case 0x19: - sysInfo->freqProcessor = 5*sysInfo->freqSystemBus/2; + case 0x19: + sysInfo->freqProcessor = 5 * sysInfo->freqSystemBus / 2; break; case 0x20: - sysInfo->freqProcessor = 3*sysInfo->freqSystemBus; + sysInfo->freqProcessor = 3 * sysInfo->freqSystemBus; break; - case 0x39: - sysInfo->freqProcessor = 7*sysInfo->freqSystemBus/2; + case 0x39: + sysInfo->freqProcessor = 7 * sysInfo->freqSystemBus / 2; break; case 0x28: - sysInfo->freqProcessor = 4*sysInfo->freqSystemBus; + sysInfo->freqProcessor = 4 * sysInfo->freqSystemBus; break; case 0x1d: - sysInfo->freqProcessor = 9*sysInfo->freqSystemBus/2; + sysInfo->freqProcessor = 9 * sysInfo->freqSystemBus / 2; break; - default: - /* JB - Emulator workaround until real cop is plugged in */ - sysInfo->freqProcessor = e600_ratio + sysInfo->freqSystemBus; - //sysInfo->freqProcessor = 3*sysInfo->freqSystemBus; + default: + sysInfo->freqProcessor = e600_ratio + sysInfo->freqSystemBus; break; } - // printf("assigned processor freq = %d for e600 ratio 0x%08lx\n", sysInfo->freqProcessor, e600_ratio); - } -/* ------------------------------------------------------------------------- */ - /* * Measure CPU clock speed (core clock GCLK1, GCLK2) - * * (Approx. GCLK frequency in Hz) */ -int get_clocks (void) +int get_clocks(void) { - DECLARE_GLOBAL_DATA_PTR; sys_info_t sys_info; - get_sys_info (&sys_info); + get_sys_info(&sys_info); gd->cpu_clk = sys_info.freqProcessor; gd->bus_clk = sys_info.freqSystemBus; - - if(gd->cpu_clk != 0) return (0); - else return (1); + + /* + * The base clock for I2C depends on the actual SOC. Unfortunately, + * there is no pattern that can be used to determine the frequency, so + * the only choice is to look up the actual SOC number and use the value + * for that SOC. This information is taken from application note + * AN2919. + */ +#ifdef CONFIG_MPC8610 + gd->i2c1_clk = sys_info.freqSystemBus; +#else + gd->i2c1_clk = sys_info.freqSystemBus / 2; +#endif + gd->i2c2_clk = gd->i2c1_clk; + + if (gd->cpu_clk != 0) + return 0; + else + return 1; } -/* ------------------------------------------------------------------------- */ -/******************************************** + +/* * get_bus_freq - * return system bus freq in Hz - *********************************************/ -ulong get_bus_freq (ulong dummy) + * Return system bus freq in Hz + */ + +ulong get_bus_freq(ulong dummy) { ulong val; - sys_info_t sys_info; - get_sys_info (&sys_info); + get_sys_info(&sys_info); val = sys_info.freqSystemBus; return val; } - -unsigned long get_sysclk_from_px_regs() -{ - ulong val; - u8 vclkh,vclkl; - - vclkh = in8(PIXIS_BASE+PIXIS_VCLKH); - vclkl = in8(PIXIS_BASE+PIXIS_VCLKL); - - if((vclkh == 0x84) && (vclkl ==0x07)) - { - val = 33000000; - } - if((vclkh == 0x3F) && (vclkl ==0x20)) - { - val = 40000000; - } - if((vclkh == 0x3F) && (vclkl ==0x2A)) - { - val = 50000000; - } - if((vclkh == 0x24) && (vclkl ==0x04)) - { - val = 66000000; - } - if((vclkh == 0x3F) && (vclkl ==0x4B)) - { - val = 83000000; - } - if((vclkh == 0x3F) && (vclkl ==0x5C)) - { - val = 100000000; - } - if((vclkh == 0xDF) && (vclkl ==0x3B)) - { - val = 134000000; - } - if((vclkh == 0xDF) && (vclkl ==0x4B)) - { - val = 166000000; - } - - return val; -} - -/******* From MPC8641HPCN Design Workbook ************ - * - * get_board_sys_clk - * reads the FPGA on board for CONFIG_SYS_CLK_FREQ - * - ********************************************************/ - -unsigned long get_board_sys_clk(ulong dummy) -{ - u8 i, go_bit, rd_clks; - ulong val; - - go_bit = in8(PIXIS_BASE+PIXIS_VCTL); - go_bit &= 0x01; - - rd_clks = in8(PIXIS_BASE+PIXIS_VCFGEN0); - rd_clks &= 0x1C; - - /* Only if both go bit and the SCLK bit in VCFGEN0 are set - * should we be using the AUX register. Remember, we also set the - * GO bit to boot from the alternate bank on the on-board flash - */ - - if(go_bit) - { - if(rd_clks == 0x1c) - i = in8(PIXIS_BASE+PIXIS_AUX); - else - i = in8(PIXIS_BASE+PIXIS_SPD); - //val = get_sysclk_from_px_regs(); - } - else - i = in8(PIXIS_BASE+PIXIS_SPD); - - i &= 0x07; - - switch(i) - { - case 0: - val = 33000000; - break; - case 1: - val = 40000000; - break; - case 2: - val = 50000000; - break; - case 3: - val = 66000000; - break; - case 4: - val = 83000000; - break; - case 5: - val = 100000000; - break; - case 6: - val = 134000000; - break; - case 7: - val = 166000000; - break; - } - - return val; -}