summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap2/io.c
blob: 40a548b203e35bcde7f2bc4190c6973f4366804d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
/*
 * linux/arch/arm/mach-omap2/io.c
 *
 * OMAP2 I/O mapping code
 *
 * Copyright (C) 2005 Nokia Corporation
 * Copyright (C) 2007-2009 Texas Instruments
 *
 * Author:
 *	Juha Yrjola <juha.yrjola@nokia.com>
 *	Syed Khasim <x0khasim@ti.com>
 *
 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/omapfb.h>

#include <asm/tlb.h>

#include <asm/mach/map.h>

#include <plat/sram.h>
#include <plat/sdrc.h>
#include <plat/gpmc.h>
#include <plat/serial.h>

#include "clock2xxx.h"
#include "clock3xxx.h"
#include "clock44xx.h"
#include "io.h"

#include <plat/omap-pm.h>
#include <plat/powerdomain.h>

#include <plat/clockdomain.h>
#include "clockdomains.h"

#include <plat/omap_hwmod.h>
#include <plat/multi.h>

/*
 * The machine specific code may provide the extra mapping besides the
 * default mapping provided here.
 */

#ifdef CONFIG_ARCH_OMAP2
static struct map_desc omap24xx_io_desc[] __initdata = {
	{
		.virtual	= L3_24XX_VIRT,
		.pfn		= __phys_to_pfn(L3_24XX_PHYS),
		.length		= L3_24XX_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= L4_24XX_VIRT,
		.pfn		= __phys_to_pfn(L4_24XX_PHYS),
		.length		= L4_24XX_SIZE,
		.type		= MT_DEVICE
	},
};

#ifdef CONFIG_ARCH_OMAP2420
static struct map_desc omap242x_io_desc[] __initdata = {
	{
		.virtual	= DSP_MEM_2420_VIRT,
		.pfn		= __phys_to_pfn(DSP_MEM_2420_PHYS),
		.length		= DSP_MEM_2420_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= DSP_IPI_2420_VIRT,
		.pfn		= __phys_to_pfn(DSP_IPI_2420_PHYS),
		.length		= DSP_IPI_2420_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= DSP_MMU_2420_VIRT,
		.pfn		= __phys_to_pfn(DSP_MMU_2420_PHYS),
		.length		= DSP_MMU_2420_SIZE,
		.type		= MT_DEVICE
	},
};

#endif

#ifdef CONFIG_ARCH_OMAP2430
static struct map_desc omap243x_io_desc[] __initdata = {
	{
		.virtual	= L4_WK_243X_VIRT,
		.pfn		= __phys_to_pfn(L4_WK_243X_PHYS),
		.length		= L4_WK_243X_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= OMAP243X_GPMC_VIRT,
		.pfn		= __phys_to_pfn(OMAP243X_GPMC_PHYS),
		.length		= OMAP243X_GPMC_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= OMAP243X_SDRC_VIRT,
		.pfn		= __phys_to_pfn(OMAP243X_SDRC_PHYS),
		.length		= OMAP243X_SDRC_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= OMAP243X_SMS_VIRT,
		.pfn		= __phys_to_pfn(OMAP243X_SMS_PHYS),
		.length		= OMAP243X_SMS_SIZE,
		.type		= MT_DEVICE
	},
};
#endif
#endif

#ifdef	CONFIG_ARCH_OMAP3
static struct map_desc omap34xx_io_desc[] __initdata = {
	{
		.virtual	= L3_34XX_VIRT,
		.pfn		= __phys_to_pfn(L3_34XX_PHYS),
		.length		= L3_34XX_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= L4_34XX_VIRT,
		.pfn		= __phys_to_pfn(L4_34XX_PHYS),
		.length		= L4_34XX_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= OMAP34XX_GPMC_VIRT,
		.pfn		= __phys_to_pfn(OMAP34XX_GPMC_PHYS),
		.length		= OMAP34XX_GPMC_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= OMAP343X_SMS_VIRT,
		.pfn		= __phys_to_pfn(OMAP343X_SMS_PHYS),
		.length		= OMAP343X_SMS_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= OMAP343X_SDRC_VIRT,
		.pfn		= __phys_to_pfn(OMAP343X_SDRC_PHYS),
		.length		= OMAP343X_SDRC_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= L4_PER_34XX_VIRT,
		.pfn		= __phys_to_pfn(L4_PER_34XX_PHYS),
		.length		= L4_PER_34XX_SIZE,
		.type		= MT_DEVICE
	},
	{
		.virtual	= L4_EMU_34XX_VIRT,
		.pfn		= __phys_to_pfn(L4_EMU_34XX_PHYS),
		.length		= L4_EMU_34XX_SIZE,
		.type		= MT_DEVICE
	},
#if defined(CONFIG_DEBUG_LL) &&							\
	(defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3))
	{
		.virtual	= ZOOM_UART_VIRT,
		.pfn		= __phys_to_pfn(ZOOM_UART_BASE),
		.length		= SZ_1M,
		.type		= MT_DEVICE
	},
#endif
};
#endif
#ifdef	CONFIG_ARCH_OMAP4
static struct map_desc omap44xx_io_desc[] __initdata = {
	{
		.virtual	= L3_44XX_VIRT,
		.pfn		= __phys_to_pfn(L3_44XX_PHYS),
		.length		= L3_44XX_SIZE,
		.type		= MT_DEVICE,
	},
	{
		.virtual	= L4_44XX_VIRT,
		.pfn		= __phys_to_pfn(L4_44XX_PHYS),
		.length		= L4_44XX_SIZE,
		.type		= MT_DEVICE,
	},
	{
		.virtual	= OMAP44XX_GPMC_VIRT,
		.pfn		= __phys_to_pfn(OMAP44XX_GPMC_PHYS),
		.length		= OMAP44XX_GPMC_SIZE,
		.type		= MT_DEVICE,
	},
	{
		.virtual	= OMAP44XX_EMIF1_VIRT,
		.pfn		= __phys_to_pfn(OMAP44XX_EMIF1_PHYS),
		.length		= OMAP44XX_EMIF1_SIZE,
		.type		= MT_DEVICE,
	},
	{
		.virtual	= OMAP44XX_EMIF2_VIRT,
		.pfn		= __phys_to_pfn(OMAP44XX_EMIF2_PHYS),
		.length		= OMAP44XX_EMIF2_SIZE,
		.type		= MT_DEVICE,
	},
	{
		.virtual	= OMAP44XX_DMM_VIRT,
		.pfn		= __phys_to_pfn(OMAP44XX_DMM_PHYS),
		.length		= OMAP44XX_DMM_SIZE,
		.type		= MT_DEVICE,
	},
	{
		.virtual	= L4_PER_44XX_VIRT,
		.pfn		= __phys_to_pfn(L4_PER_44XX_PHYS),
		.length		= L4_PER_44XX_SIZE,
		.type		= MT_DEVICE,
	},
	{
		.virtual	= L4_EMU_44XX_VIRT,
		.pfn		= __phys_to_pfn(L4_EMU_44XX_PHYS),
		.length		= L4_EMU_44XX_SIZE,
		.type		= MT_DEVICE,
	},
};
#endif

static void __init _omap2_map_common_io(void)
{
	/* Normally devicemaps_init() would flush caches and tlb after
	 * mdesc->map_io(), but we must also do it here because of the CPU
	 * revision check below.
	 */
	local_flush_tlb_all();
	flush_cache_all();

	omap2_check_revision();
	omap_sram_init();
}

#ifdef CONFIG_ARCH_OMAP2420
void __init omap242x_map_common_io(void)
{
	iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
	iotable_init(omap242x_io_desc, ARRAY_SIZE(omap242x_io_desc));
	_omap2_map_common_io();
}
#endif

#ifdef CONFIG_ARCH_OMAP2430
void __init omap243x_map_common_io(void)
{
	iotable_init(omap24xx_io_desc, ARRAY_SIZE(omap24xx_io_desc));
	iotable_init(omap243x_io_desc, ARRAY_SIZE(omap243x_io_desc));
	_omap2_map_common_io();
}
#endif

#ifdef CONFIG_ARCH_OMAP3
void __init omap34xx_map_common_io(void)
{
	iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc));
	_omap2_map_common_io();
}
#endif

#ifdef CONFIG_ARCH_OMAP4
void __init omap44xx_map_common_io(void)
{
	iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc));
	_omap2_map_common_io();
}
#endif

/*
 * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters
 *
 * Sets the CORE DPLL3 M2 divider to the same value that it's at
 * currently.  This has the effect of setting the SDRC SDRAM AC timing
 * registers to the values currently defined by the kernel.  Currently
 * only defined for OMAP3; will return 0 if called on OMAP2.  Returns
 * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2,
 * or passes along the return value of clk_set_rate().
 */
static int __init _omap2_init_reprogram_sdrc(void)
{
	struct clk *dpll3_m2_ck;
	int v = -EINVAL;
	long rate;

	if (!cpu_is_omap34xx())
		return 0;

	dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck");
	if (IS_ERR(dpll3_m2_ck))
		return -EINVAL;

	rate = clk_get_rate(dpll3_m2_ck);
	pr_info("Reprogramming SDRC clock to %ld Hz\n", rate);
	v = clk_set_rate(dpll3_m2_ck, rate);
	if (v)
		pr_err("dpll3_m2_clk rate change failed: %d\n", v);

	clk_put(dpll3_m2_ck);

	return v;
}

static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
{
	return omap_hwmod_set_postsetup_state(oh, *(u8 *)data);
}

/*
 * Initialize asm_irq_base for entry-macro.S
 */
static inline void omap_irq_base_init(void)
{
	extern void __iomem *omap_irq_base;

#ifdef MULTI_OMAP2
	if (cpu_is_omap24xx())
		omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP24XX_IC_BASE);
	else if (cpu_is_omap34xx())
		omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE);
	else if (cpu_is_omap44xx())
		omap_irq_base = OMAP2_L4_IO_ADDRESS(OMAP44XX_GIC_CPU_BASE);
	else
		pr_err("Could not initialize omap_irq_base\n");
#endif
}

void __init omap2_init_common_infrastructure(void)
{
	u8 postsetup_state;

	if (cpu_is_omap242x()) {
		omap2xxx_powerdomains_init();
		clkdm_init(clockdomains_omap, clkdm_autodeps);
		omap2420_hwmod_init();
	} else if (cpu_is_omap243x()) {
		omap2xxx_powerdomains_init();
		clkdm_init(clockdomains_omap, clkdm_autodeps);
		omap2430_hwmod_init();
	} else if (cpu_is_omap34xx()) {
		omap3xxx_powerdomains_init();
		clkdm_init(clockdomains_omap, clkdm_autodeps);
		omap3xxx_hwmod_init();
	} else if (cpu_is_omap44xx()) {
		omap44xx_powerdomains_init();
		clkdm_init(clockdomains_omap, clkdm_autodeps);
		omap44xx_hwmod_init();
	} else {
		pr_err("Could not init hwmod data - unknown SoC\n");
        }

	/* Set the default postsetup state for all hwmods */
#ifdef CONFIG_PM_RUNTIME
	postsetup_state = _HWMOD_STATE_IDLE;
#else
	postsetup_state = _HWMOD_STATE_ENABLED;
#endif
	omap_hwmod_for_each(_set_hwmod_postsetup_state, &postsetup_state);

	/*
	 * Set the default postsetup state for unusual modules (like
	 * MPU WDT).
	 *
	 * The postsetup_state is not actually used until
	 * omap_hwmod_late_init(), so boards that desire full watchdog
	 * coverage of kernel initialization can reprogram the
	 * postsetup_state between the calls to
	 * omap2_init_common_infra() and omap2_init_common_devices().
	 *
	 * XXX ideally we could detect whether the MPU WDT was currently
	 * enabled here and make this conditional
	 */
	postsetup_state = _HWMOD_STATE_DISABLED;
	omap_hwmod_for_each_by_class("wd_timer",
				     _set_hwmod_postsetup_state,
				     &postsetup_state);

	omap_pm_if_early_init();

	if (cpu_is_omap2420())
		omap2420_clk_init();
	else if (cpu_is_omap2430())
		omap2430_clk_init();
	else if (cpu_is_omap34xx())
		omap3xxx_clk_init();
	else if (cpu_is_omap44xx())
		omap4xxx_clk_init();
	else
		pr_err("Could not init clock framework - unknown SoC\n");
}

void __init omap2_init_common_devices(struct omap_sdrc_params *sdrc_cs0,
				      struct omap_sdrc_params *sdrc_cs1)
{
	omap_serial_early_init();

	omap_hwmod_late_init();

	if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
		omap2_sdrc_init(sdrc_cs0, sdrc_cs1);
		_omap2_init_reprogram_sdrc();
	}
	gpmc_init();

	omap_irq_base_init();
}

/*
 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
 */

u8 omap_readb(u32 pa)
{
	return __raw_readb(OMAP2_L4_IO_ADDRESS(pa));
}
EXPORT_SYMBOL(omap_readb);

u16 omap_readw(u32 pa)
{
	return __raw_readw(OMAP2_L4_IO_ADDRESS(pa));
}
EXPORT_SYMBOL(omap_readw);

u32 omap_readl(u32 pa)
{
	return __raw_readl(OMAP2_L4_IO_ADDRESS(pa));
}
EXPORT_SYMBOL(omap_readl);

void omap_writeb(u8 v, u32 pa)
{
	__raw_writeb(v, OMAP2_L4_IO_ADDRESS(pa));
}
EXPORT_SYMBOL(omap_writeb);

void omap_writew(u16 v, u32 pa)
{
	__raw_writew(v, OMAP2_L4_IO_ADDRESS(pa));
}
EXPORT_SYMBOL(omap_writew);

void omap_writel(u32 v, u32 pa)
{
	__raw_writel(v, OMAP2_L4_IO_ADDRESS(pa));
}
EXPORT_SYMBOL(omap_writel);