1/*
2 * linux/arch/arm/mach-omap1/io.c
3 *
4 * OMAP1 I/O mapping code
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/module.h>
12#include <linux/kernel.h>
13#include <linux/init.h>
14
15#include <asm/tlb.h>
16#include <asm/mach/map.h>
17#include <asm/io.h>
18#include <asm/arch/mux.h>
19#include <asm/arch/tc.h>
20
21extern int omap1_clk_init(void);
22extern void omap_check_revision(void);
23extern void omap_sram_init(void);
24extern void omapfb_reserve_sdram(void);
25
26/*
27 * The machine specific code may provide the extra mapping besides the
28 * default mapping provided here.
29 */
30static struct map_desc omap_io_desc[] __initdata = {
31	{
32		.virtual	= IO_VIRT,
33		.pfn		= __phys_to_pfn(IO_PHYS),
34		.length		= IO_SIZE,
35		.type		= MT_DEVICE
36	}
37};
38
39#ifdef CONFIG_ARCH_OMAP730
40static struct map_desc omap730_io_desc[] __initdata = {
41	{
42		.virtual	= OMAP730_DSP_BASE,
43		.pfn		= __phys_to_pfn(OMAP730_DSP_START),
44		.length		= OMAP730_DSP_SIZE,
45		.type		= MT_DEVICE
46	}, {
47		.virtual	= OMAP730_DSPREG_BASE,
48		.pfn		= __phys_to_pfn(OMAP730_DSPREG_START),
49		.length		= OMAP730_DSPREG_SIZE,
50		.type		= MT_DEVICE
51	}
52};
53#endif
54
55#ifdef CONFIG_ARCH_OMAP15XX
56static struct map_desc omap1510_io_desc[] __initdata = {
57	{
58		.virtual	= OMAP1510_DSP_BASE,
59		.pfn		= __phys_to_pfn(OMAP1510_DSP_START),
60		.length		= OMAP1510_DSP_SIZE,
61		.type		= MT_DEVICE
62	}, {
63		.virtual	= OMAP1510_DSPREG_BASE,
64		.pfn		= __phys_to_pfn(OMAP1510_DSPREG_START),
65		.length		= OMAP1510_DSPREG_SIZE,
66		.type		= MT_DEVICE
67	}
68};
69#endif
70
71#if defined(CONFIG_ARCH_OMAP16XX)
72static struct map_desc omap16xx_io_desc[] __initdata = {
73	{
74		.virtual	= OMAP16XX_DSP_BASE,
75		.pfn		= __phys_to_pfn(OMAP16XX_DSP_START),
76		.length		= OMAP16XX_DSP_SIZE,
77		.type		= MT_DEVICE
78	}, {
79		.virtual	= OMAP16XX_DSPREG_BASE,
80		.pfn		= __phys_to_pfn(OMAP16XX_DSPREG_START),
81		.length		= OMAP16XX_DSPREG_SIZE,
82		.type		= MT_DEVICE
83	}
84};
85#endif
86
87/*
88 * Maps common IO regions for omap1. This should only get called from
89 * board specific init.
90 */
91void __init omap1_map_common_io(void)
92{
93	iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
94
95	/* Normally devicemaps_init() would flush caches and tlb after
96	 * mdesc->map_io(), but we must also do it here because of the CPU
97	 * revision check below.
98	 */
99	local_flush_tlb_all();
100	flush_cache_all();
101
102	/* We want to check CPU revision early for cpu_is_omapxxxx() macros.
103	 * IO space mapping must be initialized before we can do that.
104	 */
105	omap_check_revision();
106
107#ifdef CONFIG_ARCH_OMAP730
108	if (cpu_is_omap730()) {
109		iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
110	}
111#endif
112#ifdef CONFIG_ARCH_OMAP15XX
113	if (cpu_is_omap15xx()) {
114		iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
115	}
116#endif
117#if defined(CONFIG_ARCH_OMAP16XX)
118	if (cpu_is_omap16xx()) {
119		iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
120	}
121#endif
122
123	omap_sram_init();
124	omapfb_reserve_sdram();
125}
126
127/*
128 * Common low-level hardware init for omap1. This should only get called from
129 * board specific init.
130 */
131void __init omap1_init_common_hw()
132{
133	/* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
134	 * on a Posted Write in the TIPB Bridge".
135	 */
136	omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
137	omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
138
139	/* Must init clocks early to assure that timer interrupt works
140	 */
141	omap1_clk_init();
142
143	omap1_mux_init();
144}
145