summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-at91/at91sam9260.c
blob: e47381e8aaba625e7abb5b6ff8cd0acc89ea04f5 (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
/*
 * arch/arm/mach-at91/at91sam9260.c
 *
 *  Copyright (C) 2006 SAN People
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#include <linux/module.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/arch/cpu.h>
#include <asm/arch/at91sam9260.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/at91_rstc.h>

#include "generic.h"
#include "clock.h"

static struct map_desc at91sam9260_io_desc[] __initdata = {
	{
		.virtual	= AT91_VA_BASE_SYS,
		.pfn		= __phys_to_pfn(AT91_BASE_SYS),
		.length		= SZ_16K,
		.type		= MT_DEVICE,
	}
};

static struct map_desc at91sam9260_sram_desc[] __initdata = {
	{
		.virtual	= AT91_IO_VIRT_BASE - AT91SAM9260_SRAM0_SIZE,
		.pfn		= __phys_to_pfn(AT91SAM9260_SRAM0_BASE),
		.length		= AT91SAM9260_SRAM0_SIZE,
		.type		= MT_DEVICE,
	}, {
		.virtual	= AT91_IO_VIRT_BASE - AT91SAM9260_SRAM0_SIZE - AT91SAM9260_SRAM1_SIZE,
		.pfn		= __phys_to_pfn(AT91SAM9260_SRAM1_BASE),
		.length		= AT91SAM9260_SRAM1_SIZE,
		.type		= MT_DEVICE,
	}
};

static struct map_desc at91sam9xe_sram_desc[] __initdata = {
	{
		.pfn		= __phys_to_pfn(AT91SAM9XE_SRAM_BASE),
		.type		= MT_DEVICE,
	}
};

/* --------------------------------------------------------------------
 *  Clocks
 * -------------------------------------------------------------------- */

/*
 * The peripheral clocks.
 */
static struct clk pioA_clk = {
	.name		= "pioA_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_PIOA,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk pioB_clk = {
	.name		= "pioB_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_PIOB,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk pioC_clk = {
	.name		= "pioC_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_PIOC,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk adc_clk = {
	.name		= "adc_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_ADC,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk usart0_clk = {
	.name		= "usart0_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_US0,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk usart1_clk = {
	.name		= "usart1_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_US1,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk usart2_clk = {
	.name		= "usart2_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_US2,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk mmc_clk = {
	.name		= "mci_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_MCI,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk udc_clk = {
	.name		= "udc_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_UDP,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk twi_clk = {
	.name		= "twi_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_TWI,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk spi0_clk = {
	.name		= "spi0_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_SPI0,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk spi1_clk = {
	.name		= "spi1_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_SPI1,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk ssc_clk = {
	.name		= "ssc_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_SSC,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk tc0_clk = {
	.name		= "tc0_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_TC0,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk tc1_clk = {
	.name		= "tc1_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_TC1,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk tc2_clk = {
	.name		= "tc2_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_TC2,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk ohci_clk = {
	.name		= "ohci_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_UHP,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk macb_clk = {
	.name		= "macb_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_EMAC,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk isi_clk = {
	.name		= "isi_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_ISI,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk usart3_clk = {
	.name		= "usart3_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_US3,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk usart4_clk = {
	.name		= "usart4_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_US4,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk usart5_clk = {
	.name		= "usart5_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_US5,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk tc3_clk = {
	.name		= "tc3_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_TC3,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk tc4_clk = {
	.name		= "tc4_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_TC4,
	.type		= CLK_TYPE_PERIPHERAL,
};
static struct clk tc5_clk = {
	.name		= "tc5_clk",
	.pmc_mask	= 1 << AT91SAM9260_ID_TC5,
	.type		= CLK_TYPE_PERIPHERAL,
};

static struct clk *periph_clocks[] __initdata = {
	&pioA_clk,
	&pioB_clk,
	&pioC_clk,
	&adc_clk,
	&usart0_clk,
	&usart1_clk,
	&usart2_clk,
	&mmc_clk,
	&udc_clk,
	&twi_clk,
	&spi0_clk,
	&spi1_clk,
	&ssc_clk,
	&tc0_clk,
	&tc1_clk,
	&tc2_clk,
	&ohci_clk,
	&macb_clk,
	&isi_clk,
	&usart3_clk,
	&usart4_clk,
	&usart5_clk,
	&tc3_clk,
	&tc4_clk,
	&tc5_clk,
	// irq0 .. irq2
};

/*
 * The two programmable clocks.
 * You must configure pin multiplexing to bring these signals out.
 */
static struct clk pck0 = {
	.name		= "pck0",
	.pmc_mask	= AT91_PMC_PCK0,
	.type		= CLK_TYPE_PROGRAMMABLE,
	.id		= 0,
};
static struct clk pck1 = {
	.name		= "pck1",
	.pmc_mask	= AT91_PMC_PCK1,
	.type		= CLK_TYPE_PROGRAMMABLE,
	.id		= 1,
};

static void __init at91sam9260_register_clocks(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
		clk_register(periph_clocks[i]);

	clk_register(&pck0);
	clk_register(&pck1);
}

/* --------------------------------------------------------------------
 *  GPIO
 * -------------------------------------------------------------------- */

static struct at91_gpio_bank at91sam9260_gpio[] = {
	{
		.id		= AT91SAM9260_ID_PIOA,
		.offset		= AT91_PIOA,
		.clock		= &pioA_clk,
	}, {
		.id		= AT91SAM9260_ID_PIOB,
		.offset		= AT91_PIOB,
		.clock		= &pioB_clk,
	}, {
		.id		= AT91SAM9260_ID_PIOC,
		.offset		= AT91_PIOC,
		.clock		= &pioC_clk,
	}
};

static void at91sam9260_reset(void)
{
	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
}


/* --------------------------------------------------------------------
 *  AT91SAM9260 processor initialization
 * -------------------------------------------------------------------- */

static void __init at91sam9xe_initialize(void)
{
	unsigned long cidr, sram_size;

	cidr = at91_sys_read(AT91_DBGU_CIDR);

	switch (cidr & AT91_CIDR_SRAMSIZ) {
		case AT91_CIDR_SRAMSIZ_32K:
			sram_size = 2 * SZ_16K;
			break;
		case AT91_CIDR_SRAMSIZ_16K:
		default:
			sram_size = SZ_16K;
	}

	at91sam9xe_sram_desc->virtual = AT91_IO_VIRT_BASE - sram_size;
	at91sam9xe_sram_desc->length = sram_size;

	iotable_init(at91sam9xe_sram_desc, ARRAY_SIZE(at91sam9xe_sram_desc));
}

void __init at91sam9260_initialize(unsigned long main_clock)
{
	/* Map peripherals */
	iotable_init(at91sam9260_io_desc, ARRAY_SIZE(at91sam9260_io_desc));

	if (cpu_is_at91sam9xe())
		at91sam9xe_initialize();
	else
		iotable_init(at91sam9260_sram_desc, ARRAY_SIZE(at91sam9260_sram_desc));

	at91_arch_reset = at91sam9260_reset;
	at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
			| (1 << AT91SAM9260_ID_IRQ2);

	/* Init clock subsystem */
	at91_clock_init(main_clock);

	/* Register the processor-specific clocks */
	at91sam9260_register_clocks();

	/* Register GPIO subsystem */
	at91_gpio_init(at91sam9260_gpio, 3);
}

/* --------------------------------------------------------------------
 *  Interrupt initialization
 * -------------------------------------------------------------------- */

/*
 * The default interrupt priority levels (0 = lowest, 7 = highest).
 */
static unsigned int at91sam9260_default_irq_priority[NR_AIC_IRQS] __initdata = {
	7,	/* Advanced Interrupt Controller */
	7,	/* System Peripherals */
	0,	/* Parallel IO Controller A */
	0,	/* Parallel IO Controller B */
	0,	/* Parallel IO Controller C */
	0,	/* Analog-to-Digital Converter */
	6,	/* USART 0 */
	6,	/* USART 1 */
	6,	/* USART 2 */
	0,	/* Multimedia Card Interface */
	4,	/* USB Device Port */
	0,	/* Two-Wire Interface */
	6,	/* Serial Peripheral Interface 0 */
	6,	/* Serial Peripheral Interface 1 */
	5,	/* Serial Synchronous Controller */
	0,
	0,
	0,	/* Timer Counter 0 */
	0,	/* Timer Counter 1 */
	0,	/* Timer Counter 2 */
	3,	/* USB Host port */
	3,	/* Ethernet */
	0,	/* Image Sensor Interface */
	6,	/* USART 3 */
	6,	/* USART 4 */
	6,	/* USART 5 */
	0,	/* Timer Counter 3 */
	0,	/* Timer Counter 4 */
	0,	/* Timer Counter 5 */
	0,	/* Advanced Interrupt Controller */
	0,	/* Advanced Interrupt Controller */
	0,	/* Advanced Interrupt Controller */
};

void __init at91sam9260_init_interrupts(unsigned int priority[NR_AIC_IRQS])
{
	if (!priority)
		priority = at91sam9260_default_irq_priority;

	/* Initialize the AIC interrupt controller */
	at91_aic_init(priority);

	/* Enable GPIO interrupts */
	at91_gpio_irq_setup();
}