Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Russell King | 2f8163b | 2011-07-26 10:53:52 +0100 | [diff] [blame] | 16 | #include <linux/gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 21 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <asm/mach/map.h> |
Eric Miao | 6769717 | 2008-12-18 11:10:32 +0800 | [diff] [blame] | 23 | #include <asm/mach-types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Robert Jarzmik | a38b1f6 | 2014-07-14 18:52:04 +0200 | [diff] [blame] | 25 | #include <mach/irqs.h> |
Russell King | afd2fc0 | 2008-08-07 11:05:25 +0100 | [diff] [blame] | 26 | #include <mach/reset.h> |
Marek Vasut | ad68bb9 | 2010-11-03 16:29:35 +0100 | [diff] [blame] | 27 | #include <mach/smemc.h> |
Haojian Zhuang | a455335 | 2010-11-24 11:54:19 +0800 | [diff] [blame] | 28 | #include <mach/pxa3xx-regs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | #include "generic.h" |
Robert Jarzmik | a38b1f6 | 2014-07-14 18:52:04 +0200 | [diff] [blame] | 31 | #include <clocksource/pxa.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Eric Miao | 04fef22 | 2008-07-29 14:26:00 +0800 | [diff] [blame] | 33 | void clear_reset_status(unsigned int mask) |
| 34 | { |
| 35 | if (cpu_is_pxa2xx()) |
| 36 | pxa2xx_clear_reset_status(mask); |
Haojian Zhuang | a455335 | 2010-11-24 11:54:19 +0800 | [diff] [blame] | 37 | else { |
| 38 | /* RESET_STATUS_* has a 1:1 mapping with ARSR */ |
| 39 | ARSR = mask; |
| 40 | } |
Eric Miao | 04fef22 | 2008-07-29 14:26:00 +0800 | [diff] [blame] | 41 | } |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | /* |
Robert Jarzmik | a38b1f6 | 2014-07-14 18:52:04 +0200 | [diff] [blame] | 44 | * For non device-tree builds, keep legacy timer init |
| 45 | */ |
Arnd Bergmann | 3d3c6a5 | 2014-07-26 20:49:39 +0200 | [diff] [blame] | 46 | void __init pxa_timer_init(void) |
Robert Jarzmik | a38b1f6 | 2014-07-14 18:52:04 +0200 | [diff] [blame] | 47 | { |
Robert Jarzmik | 5e1d012 | 2014-12-27 14:55:25 +0100 | [diff] [blame] | 48 | if (cpu_is_pxa25x()) |
| 49 | pxa25x_clocks_init(); |
| 50 | if (cpu_is_pxa27x()) |
| 51 | pxa27x_clocks_init(); |
Robert Jarzmik | a1c0a6a | 2015-02-07 22:54:03 +0100 | [diff] [blame] | 52 | if (cpu_is_pxa3xx()) |
| 53 | pxa3xx_clocks_init(); |
Robert Jarzmik | f4e14ed | 2016-09-19 21:12:13 +0200 | [diff] [blame] | 54 | pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000)); |
Robert Jarzmik | a38b1f6 | 2014-07-14 18:52:04 +0200 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | /* |
Russell King | 15a4033 | 2007-08-20 10:07:44 +0100 | [diff] [blame] | 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 | */ |
| 62 | unsigned int get_clk_frequency_khz(int info) |
| 63 | { |
Eric Miao | 0ffcbfd | 2008-09-11 10:27:30 +0800 | [diff] [blame] | 64 | if (cpu_is_pxa25x()) |
Russell King | 15a4033 | 2007-08-20 10:07:44 +0100 | [diff] [blame] | 65 | return pxa25x_get_clk_frequency_khz(info); |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 66 | else if (cpu_is_pxa27x()) |
Russell King | 15a4033 | 2007-08-20 10:07:44 +0100 | [diff] [blame] | 67 | return pxa27x_get_clk_frequency_khz(info); |
Haojian Zhuang | ecf89b8 | 2010-09-19 20:09:10 -0400 | [diff] [blame] | 68 | return 0; |
Russell King | 15a4033 | 2007-08-20 10:07:44 +0100 | [diff] [blame] | 69 | } |
| 70 | EXPORT_SYMBOL(get_clk_frequency_khz); |
| 71 | |
| 72 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | * Intel PXA2xx internal register mapping. |
| 74 | * |
Marek Vasut | 851982c | 2010-10-11 02:20:19 +0200 | [diff] [blame] | 75 | * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table |
| 76 | * and cache flush area. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | */ |
Marek Vasut | 851982c | 2010-10-11 02:20:19 +0200 | [diff] [blame] | 78 | static struct map_desc common_io_desc[] __initdata = { |
Deepak Saxena | 6f9182e | 2005-10-28 15:19:01 +0100 | [diff] [blame] | 79 | { /* Devs */ |
Laurent Pinchart | 0e32986 | 2014-07-11 13:00:36 +0200 | [diff] [blame] | 80 | .virtual = (unsigned long)PERIPH_VIRT, |
| 81 | .pfn = __phys_to_pfn(PERIPH_PHYS), |
| 82 | .length = PERIPH_SIZE, |
Deepak Saxena | 6f9182e | 2005-10-28 15:19:01 +0100 | [diff] [blame] | 83 | .type = MT_DEVICE |
| 84 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | void __init pxa_map_io(void) |
| 88 | { |
Andrew Ruder | 2111667 | 2014-06-05 14:10:57 -0500 | [diff] [blame] | 89 | debug_ll_io_init(); |
Marek Vasut | 851982c | 2010-10-11 02:20:19 +0200 | [diff] [blame] | 90 | iotable_init(ARRAY_AND_SIZE(common_io_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | } |