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>
27 #include <asm/hardware.h>
29 #include <asm/system.h>
30 #include <asm/pgtable.h>
31 #include <asm/mach/map.h>
33 #include <asm/arch/pxa-regs.h>
34 #include <asm/arch/gpio.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 * Handy function to set GPIO alternate functions
73 int pxa_gpio_mode(int gpio_mode)
76 int gpio = gpio_mode & GPIO_MD_MASK_NR;
77 int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
80 if (gpio > pxa_last_gpio)
83 local_irq_save(flags);
84 if (gpio_mode & GPIO_DFLT_LOW)
85 GPCR(gpio) = GPIO_bit(gpio);
86 else if (gpio_mode & GPIO_DFLT_HIGH)
87 GPSR(gpio) = GPIO_bit(gpio);
88 if (gpio_mode & GPIO_MD_MASK_DIR)
89 GPDR(gpio) |= GPIO_bit(gpio);
91 GPDR(gpio) &= ~GPIO_bit(gpio);
92 gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
93 GAFR(gpio) = gafr | (fn << (((gpio) & 0xf)*2));
94 local_irq_restore(flags);
99 EXPORT_SYMBOL(pxa_gpio_mode);
101 int gpio_direction_input(unsigned gpio)
106 if (gpio > pxa_last_gpio)
109 mask = GPIO_bit(gpio);
110 local_irq_save(flags);
112 local_irq_restore(flags);
116 EXPORT_SYMBOL(gpio_direction_input);
118 int gpio_direction_output(unsigned gpio, int value)
123 if (gpio > pxa_last_gpio)
126 mask = GPIO_bit(gpio);
127 local_irq_save(flags);
133 local_irq_restore(flags);
137 EXPORT_SYMBOL(gpio_direction_output);
142 int pxa_gpio_get_value(unsigned gpio)
144 return __gpio_get_value(gpio);
147 EXPORT_SYMBOL(pxa_gpio_get_value);
150 * Set output GPIO level
152 void pxa_gpio_set_value(unsigned gpio, int value)
154 __gpio_set_value(gpio, value);
157 EXPORT_SYMBOL(pxa_gpio_set_value);
160 * Routine to safely enable or disable a clock in the CKEN
162 void __pxa_set_cken(int clock, int enable)
165 local_irq_save(flags);
168 CKEN |= (1 << clock);
170 CKEN &= ~(1 << clock);
172 local_irq_restore(flags);
175 EXPORT_SYMBOL(__pxa_set_cken);
178 * Intel PXA2xx internal register mapping.
180 * Note 1: not all PXA2xx variants implement all those addresses.
182 * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
183 * and cache flush area.
185 static struct map_desc standard_io_desc[] __initdata = {
187 .virtual = 0xf2000000,
188 .pfn = __phys_to_pfn(0x40000000),
189 .length = 0x02000000,
192 .virtual = 0xf4000000,
193 .pfn = __phys_to_pfn(0x44000000),
194 .length = 0x00100000,
197 .virtual = 0xf6000000,
198 .pfn = __phys_to_pfn(0x48000000),
199 .length = 0x00200000,
202 .virtual = 0xf8000000,
203 .pfn = __phys_to_pfn(0x4c000000),
204 .length = 0x00100000,
207 .virtual = 0xfa000000,
208 .pfn = __phys_to_pfn(0x50000000),
209 .length = 0x00100000,
212 .virtual = 0xfe000000,
213 .pfn = __phys_to_pfn(0x58000000),
214 .length = 0x00100000,
216 }, { /* UNCACHED_PHYS_0 */
217 .virtual = 0xff000000,
218 .pfn = __phys_to_pfn(0x00000000),
219 .length = 0x00100000,
224 void __init pxa_map_io(void)
226 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
227 get_clk_frequency_khz(1);