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| author | Dan Williams <dan.j.williams@intel.com> | 2007-04-29 09:32:51 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-04-30 15:24:54 +0100 |
| commit | 84c981ffb371828ad6d1d220f076453b54734302 (patch) | |
| tree | 43c85aef8399847ee07e9525099a0a0f9fe6b628 /include/asm-arm/arch-iop13xx | |
| parent | 7dcad376e85b6eff56f29ee21e10e1fe855f1ed7 (diff) | |
| download | blackbird-op-linux-84c981ffb371828ad6d1d220f076453b54734302.tar.gz blackbird-op-linux-84c981ffb371828ad6d1d220f076453b54734302.zip | |
[ARM] 4343/1: iop13xx: automatically detect the internal bus frequency
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm/arch-iop13xx')
| -rw-r--r-- | include/asm-arm/arch-iop13xx/iop13xx.h | 1 | ||||
| -rw-r--r-- | include/asm-arm/arch-iop13xx/time.h | 56 |
2 files changed, 57 insertions, 0 deletions
diff --git a/include/asm-arm/arch-iop13xx/iop13xx.h b/include/asm-arm/arch-iop13xx/iop13xx.h index 2d1e23ba67c6..c8762ae8f628 100644 --- a/include/asm-arm/arch-iop13xx/iop13xx.h +++ b/include/asm-arm/arch-iop13xx/iop13xx.h @@ -455,4 +455,5 @@ static inline int iop13xx_cpu_id(void) #define IOP13XX_PBI_BAR1 IOP13XX_PBI_OFFSET(0x10) #define IOP13XX_PBI_LR1 IOP13XX_PBI_OFFSET(0x14) +#define IOP13XX_PROCESSOR_FREQ IOP13XX_REG_ADDR32(0x2180) #endif /* _IOP13XX_HW_H_ */ diff --git a/include/asm-arm/arch-iop13xx/time.h b/include/asm-arm/arch-iop13xx/time.h index 77a837a02dec..49213d9d7cad 100644 --- a/include/asm-arm/arch-iop13xx/time.h +++ b/include/asm-arm/arch-iop13xx/time.h @@ -7,9 +7,65 @@ #define IOP_TMR_PRIVILEGED 0x08 #define IOP_TMR_RATIO_1_1 0x00 +#define IOP13XX_XSI_FREQ_RATIO_MASK (3 << 19) +#define IOP13XX_XSI_FREQ_RATIO_2 (0 << 19) +#define IOP13XX_XSI_FREQ_RATIO_3 (1 << 19) +#define IOP13XX_XSI_FREQ_RATIO_4 (2 << 19) +#define IOP13XX_CORE_FREQ_MASK (7 << 16) +#define IOP13XX_CORE_FREQ_600 (0 << 16) +#define IOP13XX_CORE_FREQ_667 (1 << 16) +#define IOP13XX_CORE_FREQ_800 (2 << 16) +#define IOP13XX_CORE_FREQ_933 (3 << 16) +#define IOP13XX_CORE_FREQ_1000 (4 << 16) +#define IOP13XX_CORE_FREQ_1200 (5 << 16) + void iop_init_time(unsigned long tickrate); unsigned long iop_gettimeoffset(void); +static inline unsigned long iop13xx_core_freq(void) +{ + unsigned long freq = __raw_readl(IOP13XX_PROCESSOR_FREQ); + freq &= IOP13XX_CORE_FREQ_MASK; + switch (freq) { + case IOP13XX_CORE_FREQ_600: + return 600000000; + case IOP13XX_CORE_FREQ_667: + return 667000000; + case IOP13XX_CORE_FREQ_800: + return 800000000; + case IOP13XX_CORE_FREQ_933: + return 933000000; + case IOP13XX_CORE_FREQ_1000: + return 1000000000; + case IOP13XX_CORE_FREQ_1200: + return 1200000000; + default: + printk("%s: warning unknown frequency, defaulting to 800Mhz\n", + __FUNCTION__); + } + + return 800000000; +} + +static inline unsigned long iop13xx_xsi_bus_ratio(void) +{ + unsigned long ratio = __raw_readl(IOP13XX_PROCESSOR_FREQ); + ratio &= IOP13XX_XSI_FREQ_RATIO_MASK; + switch (ratio) { + case IOP13XX_XSI_FREQ_RATIO_2: + return 2; + case IOP13XX_XSI_FREQ_RATIO_3: + return 3; + case IOP13XX_XSI_FREQ_RATIO_4: + return 4; + default: + printk("%s: warning unknown ratio, defaulting to 2\n", + __FUNCTION__); + } + + return 2; +} + static inline void write_tmr0(u32 val) { asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (val)); |
