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Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001// SPDX-License-Identifier: GPL-2.0-only
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * 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 */
Russell King2f8163b2011-07-26 10:53:52 +010016#include <linux/gpio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
Russell Kinga09e64f2008-08-05 16:14:15 +010021#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/mach/map.h>
Eric Miao67697172008-12-18 11:10:32 +080023#include <asm/mach-types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Robert Jarzmika38b1f62014-07-14 18:52:04 +020025#include <mach/irqs.h>
Russell Kingafd2fc02008-08-07 11:05:25 +010026#include <mach/reset.h>
Marek Vasutad68bb92010-11-03 16:29:35 +010027#include <mach/smemc.h>
Haojian Zhuanga4553352010-11-24 11:54:19 +080028#include <mach/pxa3xx-regs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30#include "generic.h"
Robert Jarzmika38b1f62014-07-14 18:52:04 +020031#include <clocksource/pxa.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Eric Miao04fef222008-07-29 14:26:00 +080033void clear_reset_status(unsigned int mask)
34{
35 if (cpu_is_pxa2xx())
36 pxa2xx_clear_reset_status(mask);
Haojian Zhuanga4553352010-11-24 11:54:19 +080037 else {
38 /* RESET_STATUS_* has a 1:1 mapping with ARSR */
39 ARSR = mask;
40 }
Eric Miao04fef222008-07-29 14:26:00 +080041}
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043/*
Robert Jarzmika38b1f62014-07-14 18:52:04 +020044 * For non device-tree builds, keep legacy timer init
45 */
Arnd Bergmann3d3c6a52014-07-26 20:49:39 +020046void __init pxa_timer_init(void)
Robert Jarzmika38b1f62014-07-14 18:52:04 +020047{
Robert Jarzmik5e1d0122014-12-27 14:55:25 +010048 if (cpu_is_pxa25x())
49 pxa25x_clocks_init();
50 if (cpu_is_pxa27x())
51 pxa27x_clocks_init();
Robert Jarzmika1c0a6a2015-02-07 22:54:03 +010052 if (cpu_is_pxa3xx())
53 pxa3xx_clocks_init();
Robert Jarzmikf4e14ed2016-09-19 21:12:13 +020054 pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000));
Robert Jarzmika38b1f62014-07-14 18:52:04 +020055}
56
57/*
Russell King15a40332007-08-20 10:07:44 +010058 * 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 */
62unsigned int get_clk_frequency_khz(int info)
63{
Eric Miao0ffcbfd2008-09-11 10:27:30 +080064 if (cpu_is_pxa25x())
Russell King15a40332007-08-20 10:07:44 +010065 return pxa25x_get_clk_frequency_khz(info);
eric miao2c8086a2007-09-11 19:13:17 -070066 else if (cpu_is_pxa27x())
Russell King15a40332007-08-20 10:07:44 +010067 return pxa27x_get_clk_frequency_khz(info);
Haojian Zhuangecf89b82010-09-19 20:09:10 -040068 return 0;
Russell King15a40332007-08-20 10:07:44 +010069}
70EXPORT_SYMBOL(get_clk_frequency_khz);
71
72/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 * Intel PXA2xx internal register mapping.
74 *
Marek Vasut851982c2010-10-11 02:20:19 +020075 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table
76 * and cache flush area.
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 */
Marek Vasut851982c2010-10-11 02:20:19 +020078static struct map_desc common_io_desc[] __initdata = {
Deepak Saxena6f9182e2005-10-28 15:19:01 +010079 { /* Devs */
Laurent Pinchart0e329862014-07-11 13:00:36 +020080 .virtual = (unsigned long)PERIPH_VIRT,
81 .pfn = __phys_to_pfn(PERIPH_PHYS),
82 .length = PERIPH_SIZE,
Deepak Saxena6f9182e2005-10-28 15:19:01 +010083 .type = MT_DEVICE
84 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070085};
86
87void __init pxa_map_io(void)
88{
Andrew Ruder21116672014-06-05 14:10:57 -050089 debug_ll_io_init();
Marek Vasut851982c2010-10-11 02:20:19 +020090 iotable_init(ARRAY_AND_SIZE(common_io_desc));
Linus Torvalds1da177e2005-04-16 15:20:36 -070091}