diff options
Diffstat (limited to 'arch/arm/mach-pxa/generic.c')
| -rw-r--r-- | arch/arm/mach-pxa/generic.c | 184 |
1 files changed, 125 insertions, 59 deletions
diff --git a/arch/arm/mach-pxa/generic.c b/arch/arm/mach-pxa/generic.c index 5510f6fdce5..1c34946ee16 100644 --- a/arch/arm/mach-pxa/generic.c +++ b/arch/arm/mach-pxa/generic.c @@ -25,10 +25,6 @@ #include <linux/pm.h> #include <linux/string.h> -#include <linux/sched.h> -#include <asm/cnt32_to_63.h> -#include <asm/div64.h> - #include <asm/hardware.h> #include <asm/irq.h> #include <asm/system.h> @@ -47,66 +43,39 @@ #include "generic.h" /* - * This is the PXA2xx sched_clock implementation. This has a resolution - * of at least 308ns and a maximum value that depends on the value of - * CLOCK_TICK_RATE. - * - * The return value is guaranteed to be monotonic in that range as - * long as there is always less than 582 seconds between successive - * calls to this function. + * Get the clock frequency as reflected by CCCR and the turbo flag. + * We assume these values have been applied via a fcs. + * If info is not 0 we also display the current settings. */ -unsigned long long sched_clock(void) +unsigned int get_clk_frequency_khz(int info) { - unsigned long long v = cnt32_to_63(OSCR); - /* Note: top bit ov v needs cleared unless multiplier is even. */ - -#if CLOCK_TICK_RATE == 3686400 - /* 1E9 / 3686400 => 78125 / 288, max value = 32025597s (370 days). */ - /* The <<1 is used to get rid of tick.hi top bit */ - v *= 78125<<1; - do_div(v, 288<<1); -#elif CLOCK_TICK_RATE == 3250000 - /* 1E9 / 3250000 => 4000 / 13, max value = 709490156s (8211 days) */ - v *= 4000; - do_div(v, 13); -#elif CLOCK_TICK_RATE == 3249600 - /* 1E9 / 3249600 => 625000 / 2031, max value = 4541295s (52 days) */ - v *= 625000; - do_div(v, 2031); -#else -#warning "consider fixing sched_clock for your value of CLOCK_TICK_RATE" - /* - * 96-bit math to perform tick * NSEC_PER_SEC / CLOCK_TICK_RATE for - * any value of CLOCK_TICK_RATE. Max value is in the 80 thousand - * years range and truncation to unsigned long long limits it to - * sched_clock's max range of ~584 years. This is nice but with - * higher computation cost. - */ - { - union { - unsigned long long val; - struct { unsigned long lo, hi; }; - } x; - unsigned long long y; - - x.val = v; - x.hi &= 0x7fffffff; - y = (unsigned long long)x.lo * NSEC_PER_SEC; - x.lo = y; - y = (y >> 32) + (unsigned long long)x.hi * NSEC_PER_SEC; - x.hi = do_div(y, CLOCK_TICK_RATE); - do_div(x.val, CLOCK_TICK_RATE); - x.hi += y; - v = x.val; - } -#endif + if (cpu_is_pxa21x() || cpu_is_pxa25x()) + return pxa25x_get_clk_frequency_khz(info); + else if (cpu_is_pxa27x()) + return pxa27x_get_clk_frequency_khz(info); + else + return pxa3xx_get_clk_frequency_khz(info); +} +EXPORT_SYMBOL(get_clk_frequency_khz); - return v; +/* + * Return the current memory clock frequency in units of 10kHz + */ +unsigned int get_memclk_frequency_10khz(void) +{ + if (cpu_is_pxa21x() || cpu_is_pxa25x()) + return pxa25x_get_memclk_frequency_10khz(); + else if (cpu_is_pxa27x()) + return pxa27x_get_memclk_frequency_10khz(); + else + return pxa3xx_get_memclk_frequency_10khz(); } +EXPORT_SYMBOL(get_memclk_frequency_10khz); /* * Handy function to set GPIO alternate functions */ +int pxa_last_gpio; int pxa_gpio_mode(int gpio_mode) { @@ -115,7 +84,7 @@ int pxa_gpio_mode(int gpio_mode) int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8; int gafr; - if (gpio > PXA_LAST_GPIO) + if (gpio > pxa_last_gpio) return -EINVAL; local_irq_save(flags); @@ -136,6 +105,44 @@ int pxa_gpio_mode(int gpio_mode) EXPORT_SYMBOL(pxa_gpio_mode); +int gpio_direction_input(unsigned gpio) +{ + unsigned long flags; + u32 mask; + + if (gpio > pxa_last_gpio) + return -EINVAL; + + mask = GPIO_bit(gpio); + local_irq_save(flags); + GPDR(gpio) &= ~mask; + local_irq_restore(flags); + + return 0; +} +EXPORT_SYMBOL(gpio_direction_input); + +int gpio_direction_output(unsigned gpio, int value) +{ + unsigned long flags; + u32 mask; + + if (gpio > pxa_last_gpio) + return -EINVAL; + + mask = GPIO_bit(gpio); + local_irq_save(flags); + if (value) + GPSR(gpio) = mask; + else + GPCR(gpio) = mask; + GPDR(gpio) |= mask; + local_irq_restore(flags); + + return 0; +} +EXPORT_SYMBOL(gpio_direction_output); + /* * Return GPIO level */ @@ -159,7 +166,7 @@ EXPORT_SYMBOL(pxa_gpio_set_value); /* * Routine to safely enable or disable a clock in the CKEN */ -void pxa_set_cken(int clock, int enable) +void __pxa_set_cken(int clock, int enable) { unsigned long flags; local_irq_save(flags); @@ -172,7 +179,7 @@ void pxa_set_cken(int clock, int enable) local_irq_restore(flags); } -EXPORT_SYMBOL(pxa_set_cken); +EXPORT_SYMBOL(__pxa_set_cken); /* * Intel PXA2xx internal register mapping. @@ -329,21 +336,80 @@ void __init set_pxa_fb_parent(struct device *parent_dev) pxa_device_fb.dev.parent = parent_dev; } +static struct resource pxa_resource_ffuart[] = { + { + .start = __PREG(FFUART), + .end = __PREG(FFUART) + 35, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_FFUART, + .end = IRQ_FFUART, + .flags = IORESOURCE_IRQ, + } +}; + struct platform_device pxa_device_ffuart= { .name = "pxa2xx-uart", .id = 0, + .resource = pxa_resource_ffuart, + .num_resources = ARRAY_SIZE(pxa_resource_ffuart), }; + +static struct resource pxa_resource_btuart[] = { + { + .start = __PREG(BTUART), + .end = __PREG(BTUART) + 35, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_BTUART, + .end = IRQ_BTUART, + .flags = IORESOURCE_IRQ, + } +}; + struct platform_device pxa_device_btuart = { .name = "pxa2xx-uart", .id = 1, + .resource = pxa_resource_btuart, + .num_resources = ARRAY_SIZE(pxa_resource_btuart), }; + +static struct resource pxa_resource_stuart[] = { + { + .start = __PREG(STUART), + .end = __PREG(STUART) + 35, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_STUART, + .end = IRQ_STUART, + .flags = IORESOURCE_IRQ, + } +}; + struct platform_device pxa_device_stuart = { .name = "pxa2xx-uart", .id = 2, + .resource = pxa_resource_stuart, + .num_resources = ARRAY_SIZE(pxa_resource_stuart), }; + +static struct resource pxa_resource_hwuart[] = { + { + .start = __PREG(HWUART), + .end = __PREG(HWUART) + 47, + .flags = IORESOURCE_MEM, + }, { + .start = IRQ_HWUART, + .end = IRQ_HWUART, + .flags = IORESOURCE_IRQ, + } +}; + struct platform_device pxa_device_hwuart = { .name = "pxa2xx-uart", .id = 3, + .resource = pxa_resource_hwuart, + .num_resources = ARRAY_SIZE(pxa_resource_hwuart), }; static struct resource pxai2c_resources[] = { |