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[linux-2.6] / arch / arm / mach-at91 / at91sam9261.c
1 /*
2  * arch/arm/mach-at91/at91sam9261.c
3  *
4  *  Copyright (C) 2005 SAN People
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 as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  */
12
13 #include <linux/module.h>
14 #include <linux/pm.h>
15
16 #include <asm/mach/arch.h>
17 #include <asm/mach/map.h>
18 #include <mach/at91sam9261.h>
19 #include <mach/at91_pmc.h>
20 #include <mach/at91_rstc.h>
21 #include <mach/at91_shdwc.h>
22
23 #include "generic.h"
24 #include "clock.h"
25
26 static struct map_desc at91sam9261_io_desc[] __initdata = {
27         {
28                 .virtual        = AT91_VA_BASE_SYS,
29                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
30                 .length         = SZ_16K,
31                 .type           = MT_DEVICE,
32         }, {
33                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9261_SRAM_SIZE,
34                 .pfn            = __phys_to_pfn(AT91SAM9261_SRAM_BASE),
35                 .length         = AT91SAM9261_SRAM_SIZE,
36                 .type           = MT_DEVICE,
37         },
38 };
39
40 /* --------------------------------------------------------------------
41  *  Clocks
42  * -------------------------------------------------------------------- */
43
44 /*
45  * The peripheral clocks.
46  */
47 static struct clk pioA_clk = {
48         .name           = "pioA_clk",
49         .pmc_mask       = 1 << AT91SAM9261_ID_PIOA,
50         .type           = CLK_TYPE_PERIPHERAL,
51 };
52 static struct clk pioB_clk = {
53         .name           = "pioB_clk",
54         .pmc_mask       = 1 << AT91SAM9261_ID_PIOB,
55         .type           = CLK_TYPE_PERIPHERAL,
56 };
57 static struct clk pioC_clk = {
58         .name           = "pioC_clk",
59         .pmc_mask       = 1 << AT91SAM9261_ID_PIOC,
60         .type           = CLK_TYPE_PERIPHERAL,
61 };
62 static struct clk usart0_clk = {
63         .name           = "usart0_clk",
64         .pmc_mask       = 1 << AT91SAM9261_ID_US0,
65         .type           = CLK_TYPE_PERIPHERAL,
66 };
67 static struct clk usart1_clk = {
68         .name           = "usart1_clk",
69         .pmc_mask       = 1 << AT91SAM9261_ID_US1,
70         .type           = CLK_TYPE_PERIPHERAL,
71 };
72 static struct clk usart2_clk = {
73         .name           = "usart2_clk",
74         .pmc_mask       = 1 << AT91SAM9261_ID_US2,
75         .type           = CLK_TYPE_PERIPHERAL,
76 };
77 static struct clk mmc_clk = {
78         .name           = "mci_clk",
79         .pmc_mask       = 1 << AT91SAM9261_ID_MCI,
80         .type           = CLK_TYPE_PERIPHERAL,
81 };
82 static struct clk udc_clk = {
83         .name           = "udc_clk",
84         .pmc_mask       = 1 << AT91SAM9261_ID_UDP,
85         .type           = CLK_TYPE_PERIPHERAL,
86 };
87 static struct clk twi_clk = {
88         .name           = "twi_clk",
89         .pmc_mask       = 1 << AT91SAM9261_ID_TWI,
90         .type           = CLK_TYPE_PERIPHERAL,
91 };
92 static struct clk spi0_clk = {
93         .name           = "spi0_clk",
94         .pmc_mask       = 1 << AT91SAM9261_ID_SPI0,
95         .type           = CLK_TYPE_PERIPHERAL,
96 };
97 static struct clk spi1_clk = {
98         .name           = "spi1_clk",
99         .pmc_mask       = 1 << AT91SAM9261_ID_SPI1,
100         .type           = CLK_TYPE_PERIPHERAL,
101 };
102 static struct clk ssc0_clk = {
103         .name           = "ssc0_clk",
104         .pmc_mask       = 1 << AT91SAM9261_ID_SSC0,
105         .type           = CLK_TYPE_PERIPHERAL,
106 };
107 static struct clk ssc1_clk = {
108         .name           = "ssc1_clk",
109         .pmc_mask       = 1 << AT91SAM9261_ID_SSC1,
110         .type           = CLK_TYPE_PERIPHERAL,
111 };
112 static struct clk ssc2_clk = {
113         .name           = "ssc2_clk",
114         .pmc_mask       = 1 << AT91SAM9261_ID_SSC2,
115         .type           = CLK_TYPE_PERIPHERAL,
116 };
117 static struct clk tc0_clk = {
118         .name           = "tc0_clk",
119         .pmc_mask       = 1 << AT91SAM9261_ID_TC0,
120         .type           = CLK_TYPE_PERIPHERAL,
121 };
122 static struct clk tc1_clk = {
123         .name           = "tc1_clk",
124         .pmc_mask       = 1 << AT91SAM9261_ID_TC1,
125         .type           = CLK_TYPE_PERIPHERAL,
126 };
127 static struct clk tc2_clk = {
128         .name           = "tc2_clk",
129         .pmc_mask       = 1 << AT91SAM9261_ID_TC2,
130         .type           = CLK_TYPE_PERIPHERAL,
131 };
132 static struct clk ohci_clk = {
133         .name           = "ohci_clk",
134         .pmc_mask       = 1 << AT91SAM9261_ID_UHP,
135         .type           = CLK_TYPE_PERIPHERAL,
136 };
137 static struct clk lcdc_clk = {
138         .name           = "lcdc_clk",
139         .pmc_mask       = 1 << AT91SAM9261_ID_LCDC,
140         .type           = CLK_TYPE_PERIPHERAL,
141 };
142
143 static struct clk *periph_clocks[] __initdata = {
144         &pioA_clk,
145         &pioB_clk,
146         &pioC_clk,
147         &usart0_clk,
148         &usart1_clk,
149         &usart2_clk,
150         &mmc_clk,
151         &udc_clk,
152         &twi_clk,
153         &spi0_clk,
154         &spi1_clk,
155         &ssc0_clk,
156         &ssc1_clk,
157         &ssc2_clk,
158         &tc0_clk,
159         &tc1_clk,
160         &tc2_clk,
161         &ohci_clk,
162         &lcdc_clk,
163         // irq0 .. irq2
164 };
165
166 /*
167  * The four programmable clocks.
168  * You must configure pin multiplexing to bring these signals out.
169  */
170 static struct clk pck0 = {
171         .name           = "pck0",
172         .pmc_mask       = AT91_PMC_PCK0,
173         .type           = CLK_TYPE_PROGRAMMABLE,
174         .id             = 0,
175 };
176 static struct clk pck1 = {
177         .name           = "pck1",
178         .pmc_mask       = AT91_PMC_PCK1,
179         .type           = CLK_TYPE_PROGRAMMABLE,
180         .id             = 1,
181 };
182 static struct clk pck2 = {
183         .name           = "pck2",
184         .pmc_mask       = AT91_PMC_PCK2,
185         .type           = CLK_TYPE_PROGRAMMABLE,
186         .id             = 2,
187 };
188 static struct clk pck3 = {
189         .name           = "pck3",
190         .pmc_mask       = AT91_PMC_PCK3,
191         .type           = CLK_TYPE_PROGRAMMABLE,
192         .id             = 3,
193 };
194
195 /* HClocks */
196 static struct clk hck0 = {
197         .name           = "hck0",
198         .pmc_mask       = AT91_PMC_HCK0,
199         .type           = CLK_TYPE_SYSTEM,
200         .id             = 0,
201 };
202 static struct clk hck1 = {
203         .name           = "hck1",
204         .pmc_mask       = AT91_PMC_HCK1,
205         .type           = CLK_TYPE_SYSTEM,
206         .id             = 1,
207 };
208
209 static void __init at91sam9261_register_clocks(void)
210 {
211         int i;
212
213         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
214                 clk_register(periph_clocks[i]);
215
216         clk_register(&pck0);
217         clk_register(&pck1);
218         clk_register(&pck2);
219         clk_register(&pck3);
220
221         clk_register(&hck0);
222         clk_register(&hck1);
223 }
224
225 /* --------------------------------------------------------------------
226  *  GPIO
227  * -------------------------------------------------------------------- */
228
229 static struct at91_gpio_bank at91sam9261_gpio[] = {
230         {
231                 .id             = AT91SAM9261_ID_PIOA,
232                 .offset         = AT91_PIOA,
233                 .clock          = &pioA_clk,
234         }, {
235                 .id             = AT91SAM9261_ID_PIOB,
236                 .offset         = AT91_PIOB,
237                 .clock          = &pioB_clk,
238         }, {
239                 .id             = AT91SAM9261_ID_PIOC,
240                 .offset         = AT91_PIOC,
241                 .clock          = &pioC_clk,
242         }
243 };
244
245 static void at91sam9261_reset(void)
246 {
247         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
248 }
249
250 static void at91sam9261_poweroff(void)
251 {
252         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
253 }
254
255
256 /* --------------------------------------------------------------------
257  *  AT91SAM9261 processor initialization
258  * -------------------------------------------------------------------- */
259
260 void __init at91sam9261_initialize(unsigned long main_clock)
261 {
262         /* Map peripherals */
263         iotable_init(at91sam9261_io_desc, ARRAY_SIZE(at91sam9261_io_desc));
264
265         at91_arch_reset = at91sam9261_reset;
266         pm_power_off = at91sam9261_poweroff;
267         at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
268                         | (1 << AT91SAM9261_ID_IRQ2);
269
270         /* Init clock subsystem */
271         at91_clock_init(main_clock);
272
273         /* Register the processor-specific clocks */
274         at91sam9261_register_clocks();
275
276         /* Register GPIO subsystem */
277         at91_gpio_init(at91sam9261_gpio, 3);
278 }
279
280 /* --------------------------------------------------------------------
281  *  Interrupt initialization
282  * -------------------------------------------------------------------- */
283
284 /*
285  * The default interrupt priority levels (0 = lowest, 7 = highest).
286  */
287 static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = {
288         7,      /* Advanced Interrupt Controller */
289         7,      /* System Peripherals */
290         1,      /* Parallel IO Controller A */
291         1,      /* Parallel IO Controller B */
292         1,      /* Parallel IO Controller C */
293         0,
294         5,      /* USART 0 */
295         5,      /* USART 1 */
296         5,      /* USART 2 */
297         0,      /* Multimedia Card Interface */
298         2,      /* USB Device Port */
299         6,      /* Two-Wire Interface */
300         5,      /* Serial Peripheral Interface 0 */
301         5,      /* Serial Peripheral Interface 1 */
302         4,      /* Serial Synchronous Controller 0 */
303         4,      /* Serial Synchronous Controller 1 */
304         4,      /* Serial Synchronous Controller 2 */
305         0,      /* Timer Counter 0 */
306         0,      /* Timer Counter 1 */
307         0,      /* Timer Counter 2 */
308         2,      /* USB Host port */
309         3,      /* LCD Controller */
310         0,
311         0,
312         0,
313         0,
314         0,
315         0,
316         0,
317         0,      /* Advanced Interrupt Controller */
318         0,      /* Advanced Interrupt Controller */
319         0,      /* Advanced Interrupt Controller */
320 };
321
322 void __init at91sam9261_init_interrupts(unsigned int priority[NR_AIC_IRQS])
323 {
324         if (!priority)
325                 priority = at91sam9261_default_irq_priority;
326
327         /* Initialize the AIC interrupt controller */
328         at91_aic_init(priority);
329
330         /* Enable GPIO interrupts */
331         at91_gpio_irq_setup();
332 }