Merge branch 'next' into for-linus
[linux-2.6] / arch / arm / mach-at91 / at91sam9rl.c
1 /*
2  * arch/arm/mach-at91/at91sam9rl.c
3  *
4  *  Copyright (C) 2005 SAN People
5  *  Copyright (C) 2007 Atmel Corporation
6  *
7  * This file is subject to the terms and conditions of the GNU General Public
8  * License.  See the file COPYING in the main directory of this archive for
9  * more details.
10  */
11
12 #include <linux/module.h>
13 #include <linux/pm.h>
14
15 #include <asm/mach/arch.h>
16 #include <asm/mach/map.h>
17 #include <mach/cpu.h>
18 #include <mach/at91sam9rl.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 at91sam9rl_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 };
34
35 static struct map_desc at91sam9rl_sram_desc[] __initdata = {
36         {
37                 .pfn            = __phys_to_pfn(AT91SAM9RL_SRAM_BASE),
38                 .type           = MT_DEVICE,
39         }
40 };
41
42 /* --------------------------------------------------------------------
43  *  Clocks
44  * -------------------------------------------------------------------- */
45
46 /*
47  * The peripheral clocks.
48  */
49 static struct clk pioA_clk = {
50         .name           = "pioA_clk",
51         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOA,
52         .type           = CLK_TYPE_PERIPHERAL,
53 };
54 static struct clk pioB_clk = {
55         .name           = "pioB_clk",
56         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOB,
57         .type           = CLK_TYPE_PERIPHERAL,
58 };
59 static struct clk pioC_clk = {
60         .name           = "pioC_clk",
61         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOC,
62         .type           = CLK_TYPE_PERIPHERAL,
63 };
64 static struct clk pioD_clk = {
65         .name           = "pioD_clk",
66         .pmc_mask       = 1 << AT91SAM9RL_ID_PIOD,
67         .type           = CLK_TYPE_PERIPHERAL,
68 };
69 static struct clk usart0_clk = {
70         .name           = "usart0_clk",
71         .pmc_mask       = 1 << AT91SAM9RL_ID_US0,
72         .type           = CLK_TYPE_PERIPHERAL,
73 };
74 static struct clk usart1_clk = {
75         .name           = "usart1_clk",
76         .pmc_mask       = 1 << AT91SAM9RL_ID_US1,
77         .type           = CLK_TYPE_PERIPHERAL,
78 };
79 static struct clk usart2_clk = {
80         .name           = "usart2_clk",
81         .pmc_mask       = 1 << AT91SAM9RL_ID_US2,
82         .type           = CLK_TYPE_PERIPHERAL,
83 };
84 static struct clk usart3_clk = {
85         .name           = "usart3_clk",
86         .pmc_mask       = 1 << AT91SAM9RL_ID_US3,
87         .type           = CLK_TYPE_PERIPHERAL,
88 };
89 static struct clk mmc_clk = {
90         .name           = "mci_clk",
91         .pmc_mask       = 1 << AT91SAM9RL_ID_MCI,
92         .type           = CLK_TYPE_PERIPHERAL,
93 };
94 static struct clk twi0_clk = {
95         .name           = "twi0_clk",
96         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI0,
97         .type           = CLK_TYPE_PERIPHERAL,
98 };
99 static struct clk twi1_clk = {
100         .name           = "twi1_clk",
101         .pmc_mask       = 1 << AT91SAM9RL_ID_TWI1,
102         .type           = CLK_TYPE_PERIPHERAL,
103 };
104 static struct clk spi_clk = {
105         .name           = "spi_clk",
106         .pmc_mask       = 1 << AT91SAM9RL_ID_SPI,
107         .type           = CLK_TYPE_PERIPHERAL,
108 };
109 static struct clk ssc0_clk = {
110         .name           = "ssc0_clk",
111         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC0,
112         .type           = CLK_TYPE_PERIPHERAL,
113 };
114 static struct clk ssc1_clk = {
115         .name           = "ssc1_clk",
116         .pmc_mask       = 1 << AT91SAM9RL_ID_SSC1,
117         .type           = CLK_TYPE_PERIPHERAL,
118 };
119 static struct clk tc0_clk = {
120         .name           = "tc0_clk",
121         .pmc_mask       = 1 << AT91SAM9RL_ID_TC0,
122         .type           = CLK_TYPE_PERIPHERAL,
123 };
124 static struct clk tc1_clk = {
125         .name           = "tc1_clk",
126         .pmc_mask       = 1 << AT91SAM9RL_ID_TC1,
127         .type           = CLK_TYPE_PERIPHERAL,
128 };
129 static struct clk tc2_clk = {
130         .name           = "tc2_clk",
131         .pmc_mask       = 1 << AT91SAM9RL_ID_TC2,
132         .type           = CLK_TYPE_PERIPHERAL,
133 };
134 static struct clk pwmc_clk = {
135         .name           = "pwmc_clk",
136         .pmc_mask       = 1 << AT91SAM9RL_ID_PWMC,
137         .type           = CLK_TYPE_PERIPHERAL,
138 };
139 static struct clk tsc_clk = {
140         .name           = "tsc_clk",
141         .pmc_mask       = 1 << AT91SAM9RL_ID_TSC,
142         .type           = CLK_TYPE_PERIPHERAL,
143 };
144 static struct clk dma_clk = {
145         .name           = "dma_clk",
146         .pmc_mask       = 1 << AT91SAM9RL_ID_DMA,
147         .type           = CLK_TYPE_PERIPHERAL,
148 };
149 static struct clk udphs_clk = {
150         .name           = "udphs_clk",
151         .pmc_mask       = 1 << AT91SAM9RL_ID_UDPHS,
152         .type           = CLK_TYPE_PERIPHERAL,
153 };
154 static struct clk lcdc_clk = {
155         .name           = "lcdc_clk",
156         .pmc_mask       = 1 << AT91SAM9RL_ID_LCDC,
157         .type           = CLK_TYPE_PERIPHERAL,
158 };
159 static struct clk ac97_clk = {
160         .name           = "ac97_clk",
161         .pmc_mask       = 1 << AT91SAM9RL_ID_AC97C,
162         .type           = CLK_TYPE_PERIPHERAL,
163 };
164
165 static struct clk *periph_clocks[] __initdata = {
166         &pioA_clk,
167         &pioB_clk,
168         &pioC_clk,
169         &pioD_clk,
170         &usart0_clk,
171         &usart1_clk,
172         &usart2_clk,
173         &usart3_clk,
174         &mmc_clk,
175         &twi0_clk,
176         &twi1_clk,
177         &spi_clk,
178         &ssc0_clk,
179         &ssc1_clk,
180         &tc0_clk,
181         &tc1_clk,
182         &tc2_clk,
183         &pwmc_clk,
184         &tsc_clk,
185         &dma_clk,
186         &udphs_clk,
187         &lcdc_clk,
188         &ac97_clk,
189         // irq0
190 };
191
192 /*
193  * The two programmable clocks.
194  * You must configure pin multiplexing to bring these signals out.
195  */
196 static struct clk pck0 = {
197         .name           = "pck0",
198         .pmc_mask       = AT91_PMC_PCK0,
199         .type           = CLK_TYPE_PROGRAMMABLE,
200         .id             = 0,
201 };
202 static struct clk pck1 = {
203         .name           = "pck1",
204         .pmc_mask       = AT91_PMC_PCK1,
205         .type           = CLK_TYPE_PROGRAMMABLE,
206         .id             = 1,
207 };
208
209 static void __init at91sam9rl_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 }
219
220 /* --------------------------------------------------------------------
221  *  GPIO
222  * -------------------------------------------------------------------- */
223
224 static struct at91_gpio_bank at91sam9rl_gpio[] = {
225         {
226                 .id             = AT91SAM9RL_ID_PIOA,
227                 .offset         = AT91_PIOA,
228                 .clock          = &pioA_clk,
229         }, {
230                 .id             = AT91SAM9RL_ID_PIOB,
231                 .offset         = AT91_PIOB,
232                 .clock          = &pioB_clk,
233         }, {
234                 .id             = AT91SAM9RL_ID_PIOC,
235                 .offset         = AT91_PIOC,
236                 .clock          = &pioC_clk,
237         }, {
238                 .id             = AT91SAM9RL_ID_PIOD,
239                 .offset         = AT91_PIOD,
240                 .clock          = &pioD_clk,
241         }
242 };
243
244 static void at91sam9rl_reset(void)
245 {
246         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
247 }
248
249 static void at91sam9rl_poweroff(void)
250 {
251         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
252 }
253
254
255 /* --------------------------------------------------------------------
256  *  AT91SAM9RL processor initialization
257  * -------------------------------------------------------------------- */
258
259 void __init at91sam9rl_initialize(unsigned long main_clock)
260 {
261         unsigned long cidr, sram_size;
262
263         /* Map peripherals */
264         iotable_init(at91sam9rl_io_desc, ARRAY_SIZE(at91sam9rl_io_desc));
265
266         cidr = at91_sys_read(AT91_DBGU_CIDR);
267
268         switch (cidr & AT91_CIDR_SRAMSIZ) {
269                 case AT91_CIDR_SRAMSIZ_32K:
270                         sram_size = 2 * SZ_16K;
271                         break;
272                 case AT91_CIDR_SRAMSIZ_16K:
273                 default:
274                         sram_size = SZ_16K;
275         }
276
277         at91sam9rl_sram_desc->virtual = AT91_IO_VIRT_BASE - sram_size;
278         at91sam9rl_sram_desc->length = sram_size;
279
280         /* Map SRAM */
281         iotable_init(at91sam9rl_sram_desc, ARRAY_SIZE(at91sam9rl_sram_desc));
282
283         at91_arch_reset = at91sam9rl_reset;
284         pm_power_off = at91sam9rl_poweroff;
285         at91_extern_irq = (1 << AT91SAM9RL_ID_IRQ0);
286
287         /* Init clock subsystem */
288         at91_clock_init(main_clock);
289
290         /* Register the processor-specific clocks */
291         at91sam9rl_register_clocks();
292
293         /* Register GPIO subsystem */
294         at91_gpio_init(at91sam9rl_gpio, 4);
295 }
296
297 /* --------------------------------------------------------------------
298  *  Interrupt initialization
299  * -------------------------------------------------------------------- */
300
301 /*
302  * The default interrupt priority levels (0 = lowest, 7 = highest).
303  */
304 static unsigned int at91sam9rl_default_irq_priority[NR_AIC_IRQS] __initdata = {
305         7,      /* Advanced Interrupt Controller */
306         7,      /* System Peripherals */
307         1,      /* Parallel IO Controller A */
308         1,      /* Parallel IO Controller B */
309         1,      /* Parallel IO Controller C */
310         1,      /* Parallel IO Controller D */
311         5,      /* USART 0 */
312         5,      /* USART 1 */
313         5,      /* USART 2 */
314         5,      /* USART 3 */
315         0,      /* Multimedia Card Interface */
316         6,      /* Two-Wire Interface 0 */
317         6,      /* Two-Wire Interface 1 */
318         5,      /* Serial Peripheral Interface */
319         4,      /* Serial Synchronous Controller 0 */
320         4,      /* Serial Synchronous Controller 1 */
321         0,      /* Timer Counter 0 */
322         0,      /* Timer Counter 1 */
323         0,      /* Timer Counter 2 */
324         0,
325         0,      /* Touch Screen Controller */
326         0,      /* DMA Controller */
327         2,      /* USB Device High speed port */
328         2,      /* LCD Controller */
329         6,      /* AC97 Controller */
330         0,
331         0,
332         0,
333         0,
334         0,
335         0,
336         0,      /* Advanced Interrupt Controller */
337 };
338
339 void __init at91sam9rl_init_interrupts(unsigned int priority[NR_AIC_IRQS])
340 {
341         if (!priority)
342                 priority = at91sam9rl_default_irq_priority;
343
344         /* Initialize the AIC interrupt controller */
345         at91_aic_init(priority);
346
347         /* Enable GPIO interrupts */
348         at91_gpio_irq_setup();
349 }