diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/mips/incaip_clock.c | 89 |
1 files changed, 42 insertions, 47 deletions
diff --git a/cpu/mips/incaip_clock.c b/cpu/mips/incaip_clock.c index 4ae06b7..a042b8a 100644 --- a/cpu/mips/incaip_clock.c +++ b/cpu/mips/incaip_clock.c @@ -40,33 +40,28 @@ * frequency of the CPU. Don't use the macros, which are set to init the CPU * frequency in the ROM code. */ -uint incaip_get_cpuclk(void) +uint incaip_get_cpuclk (void) { - /*-------------------------------------------------------------------------*/ - /* CPU Clock Input Multiplexer (MUX I) */ - /* Multiplexer MUX I selects the maximum input clock to the CPU. */ - /*-------------------------------------------------------------------------*/ - if (*((volatile ulong*)INCA_IP_CGU_CGU_MUXCR) & INCA_IP_CGU_CGU_MUXCR_MUXI) - { - /* MUX I set to 150 MHz clock */ - return 150000000; - } - else - { - /* MUX I set to 100/133 MHz clock */ - if (*((volatile ulong*)INCA_IP_CGU_CGU_DIVCR) & 0x40) - { - /* Division value is 1/3, maximum CPU operating */ - /* frequency is 133.3 MHz */ - return 130000000; - } - else - { - /* Division value is 1/4, maximum CPU operating */ - /* frequency is 100 MHz */ - return 100000000; - } - } + /*-------------------------------------------------------------------------*/ + /* CPU Clock Input Multiplexer (MUX I) */ + /* Multiplexer MUX I selects the maximum input clock to the CPU. */ + /*-------------------------------------------------------------------------*/ + if (*((volatile ulong *) INCA_IP_CGU_CGU_MUXCR) & + INCA_IP_CGU_CGU_MUXCR_MUXI) { + /* MUX I set to 150 MHz clock */ + return 150000000; + } else { + /* MUX I set to 100/133 MHz clock */ + if (*((volatile ulong *) INCA_IP_CGU_CGU_DIVCR) & 0x40) { + /* Division value is 1/3, maximum CPU operating */ + /* frequency is 133.3 MHz */ + return 130000000; + } else { + /* Division value is 1/4, maximum CPU operating */ + /* frequency is 100 MHz */ + return 100000000; + } + } } /******************************************************************************* @@ -83,36 +78,36 @@ uint incaip_get_cpuclk(void) * frequency in the ROM code. * The calculation for the */ -uint incaip_get_fpiclk(void) +uint incaip_get_fpiclk (void) { - uint clkCPU; + uint clkCPU; - clkCPU = incaip_get_cpuclk(); + clkCPU = incaip_get_cpuclk (); - switch (*((volatile ulong*)INCA_IP_CGU_CGU_DIVCR) & 0xC) - { - case 0x4: - return clkCPU >> 1; /* devided by 2 */ - break; - case 0x8: - return clkCPU >> 2; /* devided by 4 */ - break; - default: - return clkCPU; - break; - } + switch (*((volatile ulong *) INCA_IP_CGU_CGU_DIVCR) & 0xC) { + case 0x4: + return clkCPU >> 1; /* devided by 2 */ + break; + case 0x8: + return clkCPU >> 2; /* devided by 4 */ + break; + default: + return clkCPU; + break; + } } -int incaip_set_cpuclk(void) +int incaip_set_cpuclk (void) { + extern void ebu_init(long); + extern void cgu_init(long); uchar tmp[64]; ulong cpuclk; - if (getenv_r("cpuclk", tmp, sizeof(tmp)) > 0) - { - cpuclk = simple_strtoul(tmp, NULL, 10) * 1000000; - ebu_init(cpuclk); - cgu_init(cpuclk); + if (getenv_r ("cpuclk", tmp, sizeof (tmp)) > 0) { + cpuclk = simple_strtoul (tmp, NULL, 10) * 1000000; + ebu_init (cpuclk); + cgu_init (cpuclk); } return 0; |