| | 1 | /* |
| | 2 | * linux/arch/arm/mach-pxa/generic.c |
| | 3 | * |
| | 4 | * Author: Nicolas Pitre |
| | 5 | * Created: Jun 15, 2001 |
| | 6 | * Copyright: MontaVista Software Inc. |
| | 7 | * |
| | 8 | * Code common to all PXA machines. |
| | 9 | * |
| | 10 | * This program is free software; you can redistribute it and/or modify |
| | 11 | * it under the terms of the GNU General Public License version 2 as |
| | 12 | * published by the Free Software Foundation. |
| | 13 | * |
| | 14 | * Since this file should be linked before any other machine specific file, |
| | 15 | * the __initcall() here will be executed first. This serves as default |
| | 16 | * initialization stuff for PXA machines which can be overridden later if |
| | 17 | * need be. |
| | 18 | */ |
| | 19 | #include <linux/gpio.h> |
| | 20 | #include <linux/module.h> |
| | 21 | #include <linux/kernel.h> |
| | 22 | #include <linux/init.h> |
| | 23 | |
| | 24 | #include <mach/hardware.h> |
| | 25 | #include <asm/mach/map.h> |
| | 26 | #include <asm/mach-types.h> |
| | 27 | |
| | 28 | #include <mach/irqs.h> |
| | 29 | #include <mach/reset.h> |
| | 30 | #include <mach/smemc.h> |
| | 31 | #include <mach/pxa3xx-regs.h> |
| | 32 | |
| | 33 | #include "generic.h" |
| | 34 | #include <clocksource/pxa.h> |
| | 35 | |
| | 36 | void clear_reset_status(unsigned int mask) |
| | 37 | { |
| | 38 | if (cpu_is_pxa2xx()) |
| | 39 | pxa2xx_clear_reset_status(mask); |
| | 40 | else { |
| | 41 | /* RESET_STATUS_* has a 1:1 mapping with ARSR */ |
| | 42 | ARSR = mask; |
| | 43 | } |
| | 44 | } |
| | 45 | |
| | 46 | unsigned long get_clock_tick_rate(void) |
| | 47 | { |
| | 48 | unsigned long clock_tick_rate; |
| | 49 | |
| | 50 | if (cpu_is_pxa25x()) |
| | 51 | clock_tick_rate = 3686400; |
| | 52 | else if (machine_is_mainstone()) |
| | 53 | clock_tick_rate = 3249600; |
| | 54 | else |
| | 55 | clock_tick_rate = 3250000; |
| | 56 | |
| | 57 | return clock_tick_rate; |
| | 58 | } |
| | 59 | EXPORT_SYMBOL(get_clock_tick_rate); |
| | 60 | |
| | 61 | /* |
| | 62 | * For non device-tree builds, keep legacy timer init |
| | 63 | */ |
| | 64 | void __init pxa_timer_init(void) |
| | 65 | { |
| | 66 | if (cpu_is_pxa25x()) |
| | 67 | pxa25x_clocks_init(); |
| | 68 | if (cpu_is_pxa27x()) |
| | 69 | pxa27x_clocks_init(); |
| | 70 | if (cpu_is_pxa3xx()) |
| | 71 | pxa3xx_clocks_init(); |
| | 72 | pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000), |
| | 73 | get_clock_tick_rate()); |
| | 74 | } |
| | 75 | |
| | 76 | /* |
| | 77 | * Get the clock frequency as reflected by CCCR and the turbo flag. |
| | 78 | * We assume these values have been applied via a fcs. |
| | 79 | * If info is not 0 we also display the current settings. |
| | 80 | */ |
| | 81 | unsigned int get_clk_frequency_khz(int info) |
| | 82 | { |
| | 83 | if (cpu_is_pxa25x()) |
| | 84 | return pxa25x_get_clk_frequency_khz(info); |
| | 85 | else if (cpu_is_pxa27x()) |
| | 86 | return pxa27x_get_clk_frequency_khz(info); |
| | 87 | return 0; |
| | 88 | } |
| | 89 | EXPORT_SYMBOL(get_clk_frequency_khz); |
| | 90 | |
| | 91 | /* |
| | 92 | * Intel PXA2xx internal register mapping. |
| | 93 | * |
| | 94 | * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table |
| | 95 | * and cache flush area. |
| | 96 | */ |
| | 97 | static struct map_desc common_io_desc[] __initdata = { |
| | 98 | { /* Devs */ |
| | 99 | .virtual = (unsigned long)PERIPH_VIRT, |
| | 100 | .pfn = __phys_to_pfn(PERIPH_PHYS), |
| | 101 | .length = PERIPH_SIZE, |
| | 102 | .type = MT_DEVICE |
| | 103 | } |
| | 104 | }; |
| | 105 | |
| | 106 | void __init pxa_map_io(void) |
| | 107 | { |
| | 108 | debug_ll_io_init(); |
| | 109 | iotable_init(ARRAY_AND_SIZE(common_io_desc)); |
| | 110 | } |
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