1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *  linux/arch/arm/mach-pxa/generic.c
4  *
5  *  Author:	Nicolas Pitre
6  *  Created:	Jun 15, 2001
7  *  Copyright:	MontaVista Software Inc.
8  *
9  * Code common to all PXA machines.
10  *
11  * Since this file should be linked before any other machine specific file,
12  * the __initcall() here will be executed first.  This serves as default
13  * initialization stuff for PXA machines which can be overridden later if
14  * need be.
15  */
16 #include <linux/gpio.h>
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 
21 #include <mach/hardware.h>
22 #include <asm/mach/map.h>
23 #include <asm/mach-types.h>
24 
25 #include <mach/irqs.h>
26 #include <mach/reset.h>
27 #include <mach/smemc.h>
28 #include <mach/pxa3xx-regs.h>
29 
30 #include "generic.h"
31 #include <clocksource/pxa.h>
32 
clear_reset_status(unsigned int mask)33 void clear_reset_status(unsigned int mask)
34 {
35 	if (cpu_is_pxa2xx())
36 		pxa2xx_clear_reset_status(mask);
37 	else {
38 		/* RESET_STATUS_* has a 1:1 mapping with ARSR */
39 		ARSR = mask;
40 	}
41 }
42 
43 /*
44  * For non device-tree builds, keep legacy timer init
45  */
pxa_timer_init(void)46 void __init pxa_timer_init(void)
47 {
48 	if (cpu_is_pxa25x())
49 		pxa25x_clocks_init();
50 	if (cpu_is_pxa27x())
51 		pxa27x_clocks_init();
52 	if (cpu_is_pxa3xx())
53 		pxa3xx_clocks_init();
54 	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000));
55 }
56 
57 /*
58  * Get the clock frequency as reflected by CCCR and the turbo flag.
59  * We assume these values have been applied via a fcs.
60  * If info is not 0 we also display the current settings.
61  */
get_clk_frequency_khz(int info)62 unsigned int get_clk_frequency_khz(int info)
63 {
64 	if (cpu_is_pxa25x())
65 		return pxa25x_get_clk_frequency_khz(info);
66 	else if (cpu_is_pxa27x())
67 		return pxa27x_get_clk_frequency_khz(info);
68 	return 0;
69 }
70 EXPORT_SYMBOL(get_clk_frequency_khz);
71 
72 /*
73  * Intel PXA2xx internal register mapping.
74  *
75  * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table
76  *       and cache flush area.
77  */
78 static struct map_desc common_io_desc[] __initdata = {
79   	{	/* Devs */
80 		.virtual	= (unsigned long)PERIPH_VIRT,
81 		.pfn		= __phys_to_pfn(PERIPH_PHYS),
82 		.length		= PERIPH_SIZE,
83 		.type		= MT_DEVICE
84 	}
85 };
86 
pxa_map_io(void)87 void __init pxa_map_io(void)
88 {
89 	debug_ll_io_init();
90 	iotable_init(ARRAY_AND_SIZE(common_io_desc));
91 }
92