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/module.h> 20 #include <linux/kernel.h> 21 #include <linux/init.h> 22 23 #include <asm/hardware.h> 24 #include <asm/system.h> 25 #include <asm/pgtable.h> 26 #include <asm/mach/map.h> 27 28 #include <asm/arch/pxa-regs.h> 29 30 #include "generic.h" 31 32 /* 33 * Get the clock frequency as reflected by CCCR and the turbo flag. 34 * We assume these values have been applied via a fcs. 35 * If info is not 0 we also display the current settings. 36 */ 37 unsigned int get_clk_frequency_khz(int info) 38 { 39 if (cpu_is_pxa21x() || cpu_is_pxa25x()) 40 return pxa25x_get_clk_frequency_khz(info); 41 else if (cpu_is_pxa27x()) 42 return pxa27x_get_clk_frequency_khz(info); 43 else 44 return pxa3xx_get_clk_frequency_khz(info); 45 } 46 EXPORT_SYMBOL(get_clk_frequency_khz); 47 48 /* 49 * Return the current memory clock frequency in units of 10kHz 50 */ 51 unsigned int get_memclk_frequency_10khz(void) 52 { 53 if (cpu_is_pxa21x() || cpu_is_pxa25x()) 54 return pxa25x_get_memclk_frequency_10khz(); 55 else if (cpu_is_pxa27x()) 56 return pxa27x_get_memclk_frequency_10khz(); 57 else 58 return pxa3xx_get_memclk_frequency_10khz(); 59 } 60 EXPORT_SYMBOL(get_memclk_frequency_10khz); 61 62 /* 63 * Intel PXA2xx internal register mapping. 64 * 65 * Note 1: not all PXA2xx variants implement all those addresses. 66 * 67 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table 68 * and cache flush area. 69 */ 70 static struct map_desc standard_io_desc[] __initdata = { 71 { /* Devs */ 72 .virtual = 0xf2000000, 73 .pfn = __phys_to_pfn(0x40000000), 74 .length = 0x02000000, 75 .type = MT_DEVICE 76 }, { /* Mem Ctl */ 77 .virtual = 0xf6000000, 78 .pfn = __phys_to_pfn(0x48000000), 79 .length = 0x00200000, 80 .type = MT_DEVICE 81 }, { /* USB host */ 82 .virtual = 0xf8000000, 83 .pfn = __phys_to_pfn(0x4c000000), 84 .length = 0x00100000, 85 .type = MT_DEVICE 86 }, { /* Camera */ 87 .virtual = 0xfa000000, 88 .pfn = __phys_to_pfn(0x50000000), 89 .length = 0x00100000, 90 .type = MT_DEVICE 91 }, { /* IMem ctl */ 92 .virtual = 0xfe000000, 93 .pfn = __phys_to_pfn(0x58000000), 94 .length = 0x00100000, 95 .type = MT_DEVICE 96 }, { /* UNCACHED_PHYS_0 */ 97 .virtual = 0xff000000, 98 .pfn = __phys_to_pfn(0x00000000), 99 .length = 0x00100000, 100 .type = MT_DEVICE 101 } 102 }; 103 104 void __init pxa_map_io(void) 105 { 106 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); 107 get_clk_frequency_khz(1); 108 } 109