2 * linux/arch/arm/mach-pxa/generic.c
4 * Author: Nicolas Pitre
5 * Created: Jun 15, 2001
6 * Copyright: MontaVista Software Inc.
8 * Code common to all PXA machines.
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.
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
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/delay.h>
23 #include <linux/ioport.h>
25 #include <linux/string.h>
26 #include <linux/sysdev.h>
28 #include <asm/hardware.h>
30 #include <asm/system.h>
31 #include <asm/pgtable.h>
32 #include <asm/mach/map.h>
34 #include <asm/arch/pxa-regs.h>
39 * Get the clock frequency as reflected by CCCR and the turbo flag.
40 * We assume these values have been applied via a fcs.
41 * If info is not 0 we also display the current settings.
43 unsigned int get_clk_frequency_khz(int info)
45 if (cpu_is_pxa21x() || cpu_is_pxa25x())
46 return pxa25x_get_clk_frequency_khz(info);
47 else if (cpu_is_pxa27x())
48 return pxa27x_get_clk_frequency_khz(info);
50 return pxa3xx_get_clk_frequency_khz(info);
52 EXPORT_SYMBOL(get_clk_frequency_khz);
55 * Return the current memory clock frequency in units of 10kHz
57 unsigned int get_memclk_frequency_10khz(void)
59 if (cpu_is_pxa21x() || cpu_is_pxa25x())
60 return pxa25x_get_memclk_frequency_10khz();
61 else if (cpu_is_pxa27x())
62 return pxa27x_get_memclk_frequency_10khz();
64 return pxa3xx_get_memclk_frequency_10khz();
66 EXPORT_SYMBOL(get_memclk_frequency_10khz);
69 * Routine to safely enable or disable a clock in the CKEN
71 void __pxa_set_cken(int clock, int enable)
74 local_irq_save(flags);
79 CKEN &= ~(1 << clock);
81 local_irq_restore(flags);
83 EXPORT_SYMBOL(__pxa_set_cken);
86 * Intel PXA2xx internal register mapping.
88 * Note 1: not all PXA2xx variants implement all those addresses.
90 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
91 * and cache flush area.
93 static struct map_desc standard_io_desc[] __initdata = {
95 .virtual = 0xf2000000,
96 .pfn = __phys_to_pfn(0x40000000),
100 .virtual = 0xf4000000,
101 .pfn = __phys_to_pfn(0x44000000),
102 .length = 0x00100000,
105 .virtual = 0xf6000000,
106 .pfn = __phys_to_pfn(0x48000000),
107 .length = 0x00200000,
110 .virtual = 0xf8000000,
111 .pfn = __phys_to_pfn(0x4c000000),
112 .length = 0x00100000,
115 .virtual = 0xfa000000,
116 .pfn = __phys_to_pfn(0x50000000),
117 .length = 0x00100000,
120 .virtual = 0xfe000000,
121 .pfn = __phys_to_pfn(0x58000000),
122 .length = 0x00100000,
124 }, { /* UNCACHED_PHYS_0 */
125 .virtual = 0xff000000,
126 .pfn = __phys_to_pfn(0x00000000),
127 .length = 0x00100000,
132 void __init pxa_map_io(void)
134 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
135 get_clk_frequency_khz(1);
140 static unsigned long saved_gplr[4];
141 static unsigned long saved_gpdr[4];
142 static unsigned long saved_grer[4];
143 static unsigned long saved_gfer[4];
145 static int pxa_gpio_suspend(struct sys_device *dev, pm_message_t state)
149 for (gpio = 0, i = 0; gpio < pxa_last_gpio; gpio += 32, i++) {
150 saved_gplr[i] = GPLR(gpio);
151 saved_gpdr[i] = GPDR(gpio);
152 saved_grer[i] = GRER(gpio);
153 saved_gfer[i] = GFER(gpio);
155 /* Clear GPIO transition detect bits */
156 GEDR(gpio) = GEDR(gpio);
161 static int pxa_gpio_resume(struct sys_device *dev)
165 for (gpio = 0, i = 0; gpio < pxa_last_gpio; gpio += 32, i++) {
166 /* restore level with set/clear */
167 GPSR(gpio) = saved_gplr[i];
168 GPCR(gpio) = ~saved_gplr[i];
170 GRER(gpio) = saved_grer[i];
171 GFER(gpio) = saved_gfer[i];
172 GPDR(gpio) = saved_gpdr[i];
177 #define pxa_gpio_suspend NULL
178 #define pxa_gpio_resume NULL
181 struct sysdev_class pxa_gpio_sysclass = {
183 .suspend = pxa_gpio_suspend,
184 .resume = pxa_gpio_resume,
187 static int __init pxa_gpio_init(void)
189 return sysdev_class_register(&pxa_gpio_sysclass);
192 core_initcall(pxa_gpio_init);