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/reset.h> 29 #include <mach/smemc.h> 30 #include <mach/pxa3xx-regs.h> 31 32 #include "generic.h" 33 34 void clear_reset_status(unsigned int mask) 35 { 36 if (cpu_is_pxa2xx()) 37 pxa2xx_clear_reset_status(mask); 38 else { 39 /* RESET_STATUS_* has a 1:1 mapping with ARSR */ 40 ARSR = mask; 41 } 42 } 43 44 unsigned long get_clock_tick_rate(void) 45 { 46 unsigned long clock_tick_rate; 47 48 if (cpu_is_pxa25x()) 49 clock_tick_rate = 3686400; 50 else if (machine_is_mainstone()) 51 clock_tick_rate = 3249600; 52 else 53 clock_tick_rate = 3250000; 54 55 return clock_tick_rate; 56 } 57 EXPORT_SYMBOL(get_clock_tick_rate); 58 59 /* 60 * Get the clock frequency as reflected by CCCR and the turbo flag. 61 * We assume these values have been applied via a fcs. 62 * If info is not 0 we also display the current settings. 63 */ 64 unsigned int get_clk_frequency_khz(int info) 65 { 66 if (cpu_is_pxa25x()) 67 return pxa25x_get_clk_frequency_khz(info); 68 else if (cpu_is_pxa27x()) 69 return pxa27x_get_clk_frequency_khz(info); 70 return 0; 71 } 72 EXPORT_SYMBOL(get_clk_frequency_khz); 73 74 /* 75 * Intel PXA2xx internal register mapping. 76 * 77 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table 78 * and cache flush area. 79 */ 80 static struct map_desc common_io_desc[] __initdata = { 81 { /* Devs */ 82 .virtual = 0xf2000000, 83 .pfn = __phys_to_pfn(0x40000000), 84 .length = 0x02000000, 85 .type = MT_DEVICE 86 }, { /* UNCACHED_PHYS_0 */ 87 .virtual = 0xff000000, 88 .pfn = __phys_to_pfn(0x00000000), 89 .length = 0x00100000, 90 .type = MT_DEVICE 91 } 92 }; 93 94 void __init pxa_map_io(void) 95 { 96 iotable_init(ARRAY_AND_SIZE(common_io_desc)); 97 } 98