xref: /linux/arch/arm/mach-at91/at91rm9200.c (revision c6bd5bcc4983f1a2d2f87a3769bf309482ee8c04)
1 /*
2  * arch/arm/mach-at91/at91rm9200.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 
15 #include <asm/irq.h>
16 #include <asm/mach/arch.h>
17 #include <asm/mach/map.h>
18 #include <asm/system_misc.h>
19 #include <mach/at91rm9200.h>
20 #include <mach/at91_aic.h>
21 #include <mach/at91_pmc.h>
22 #include <mach/at91_st.h>
23 #include <mach/cpu.h>
24 
25 #include "soc.h"
26 #include "generic.h"
27 #include "clock.h"
28 #include "sam9_smc.h"
29 
30 /* --------------------------------------------------------------------
31  *  Clocks
32  * -------------------------------------------------------------------- */
33 
34 /*
35  * The peripheral clocks.
36  */
37 static struct clk udc_clk = {
38 	.name		= "udc_clk",
39 	.pmc_mask	= 1 << AT91RM9200_ID_UDP,
40 	.type		= CLK_TYPE_PERIPHERAL,
41 };
42 static struct clk ohci_clk = {
43 	.name		= "ohci_clk",
44 	.pmc_mask	= 1 << AT91RM9200_ID_UHP,
45 	.type		= CLK_TYPE_PERIPHERAL,
46 };
47 static struct clk ether_clk = {
48 	.name		= "ether_clk",
49 	.pmc_mask	= 1 << AT91RM9200_ID_EMAC,
50 	.type		= CLK_TYPE_PERIPHERAL,
51 };
52 static struct clk mmc_clk = {
53 	.name		= "mci_clk",
54 	.pmc_mask	= 1 << AT91RM9200_ID_MCI,
55 	.type		= CLK_TYPE_PERIPHERAL,
56 };
57 static struct clk twi_clk = {
58 	.name		= "twi_clk",
59 	.pmc_mask	= 1 << AT91RM9200_ID_TWI,
60 	.type		= CLK_TYPE_PERIPHERAL,
61 };
62 static struct clk usart0_clk = {
63 	.name		= "usart0_clk",
64 	.pmc_mask	= 1 << AT91RM9200_ID_US0,
65 	.type		= CLK_TYPE_PERIPHERAL,
66 };
67 static struct clk usart1_clk = {
68 	.name		= "usart1_clk",
69 	.pmc_mask	= 1 << AT91RM9200_ID_US1,
70 	.type		= CLK_TYPE_PERIPHERAL,
71 };
72 static struct clk usart2_clk = {
73 	.name		= "usart2_clk",
74 	.pmc_mask	= 1 << AT91RM9200_ID_US2,
75 	.type		= CLK_TYPE_PERIPHERAL,
76 };
77 static struct clk usart3_clk = {
78 	.name		= "usart3_clk",
79 	.pmc_mask	= 1 << AT91RM9200_ID_US3,
80 	.type		= CLK_TYPE_PERIPHERAL,
81 };
82 static struct clk spi_clk = {
83 	.name		= "spi_clk",
84 	.pmc_mask	= 1 << AT91RM9200_ID_SPI,
85 	.type		= CLK_TYPE_PERIPHERAL,
86 };
87 static struct clk pioA_clk = {
88 	.name		= "pioA_clk",
89 	.pmc_mask	= 1 << AT91RM9200_ID_PIOA,
90 	.type		= CLK_TYPE_PERIPHERAL,
91 };
92 static struct clk pioB_clk = {
93 	.name		= "pioB_clk",
94 	.pmc_mask	= 1 << AT91RM9200_ID_PIOB,
95 	.type		= CLK_TYPE_PERIPHERAL,
96 };
97 static struct clk pioC_clk = {
98 	.name		= "pioC_clk",
99 	.pmc_mask	= 1 << AT91RM9200_ID_PIOC,
100 	.type		= CLK_TYPE_PERIPHERAL,
101 };
102 static struct clk pioD_clk = {
103 	.name		= "pioD_clk",
104 	.pmc_mask	= 1 << AT91RM9200_ID_PIOD,
105 	.type		= CLK_TYPE_PERIPHERAL,
106 };
107 static struct clk ssc0_clk = {
108 	.name		= "ssc0_clk",
109 	.pmc_mask	= 1 << AT91RM9200_ID_SSC0,
110 	.type		= CLK_TYPE_PERIPHERAL,
111 };
112 static struct clk ssc1_clk = {
113 	.name		= "ssc1_clk",
114 	.pmc_mask	= 1 << AT91RM9200_ID_SSC1,
115 	.type		= CLK_TYPE_PERIPHERAL,
116 };
117 static struct clk ssc2_clk = {
118 	.name		= "ssc2_clk",
119 	.pmc_mask	= 1 << AT91RM9200_ID_SSC2,
120 	.type		= CLK_TYPE_PERIPHERAL,
121 };
122 static struct clk tc0_clk = {
123 	.name		= "tc0_clk",
124 	.pmc_mask	= 1 << AT91RM9200_ID_TC0,
125 	.type		= CLK_TYPE_PERIPHERAL,
126 };
127 static struct clk tc1_clk = {
128 	.name		= "tc1_clk",
129 	.pmc_mask	= 1 << AT91RM9200_ID_TC1,
130 	.type		= CLK_TYPE_PERIPHERAL,
131 };
132 static struct clk tc2_clk = {
133 	.name		= "tc2_clk",
134 	.pmc_mask	= 1 << AT91RM9200_ID_TC2,
135 	.type		= CLK_TYPE_PERIPHERAL,
136 };
137 static struct clk tc3_clk = {
138 	.name		= "tc3_clk",
139 	.pmc_mask	= 1 << AT91RM9200_ID_TC3,
140 	.type		= CLK_TYPE_PERIPHERAL,
141 };
142 static struct clk tc4_clk = {
143 	.name		= "tc4_clk",
144 	.pmc_mask	= 1 << AT91RM9200_ID_TC4,
145 	.type		= CLK_TYPE_PERIPHERAL,
146 };
147 static struct clk tc5_clk = {
148 	.name		= "tc5_clk",
149 	.pmc_mask	= 1 << AT91RM9200_ID_TC5,
150 	.type		= CLK_TYPE_PERIPHERAL,
151 };
152 
153 static struct clk *periph_clocks[] __initdata = {
154 	&pioA_clk,
155 	&pioB_clk,
156 	&pioC_clk,
157 	&pioD_clk,
158 	&usart0_clk,
159 	&usart1_clk,
160 	&usart2_clk,
161 	&usart3_clk,
162 	&mmc_clk,
163 	&udc_clk,
164 	&twi_clk,
165 	&spi_clk,
166 	&ssc0_clk,
167 	&ssc1_clk,
168 	&ssc2_clk,
169 	&tc0_clk,
170 	&tc1_clk,
171 	&tc2_clk,
172 	&tc3_clk,
173 	&tc4_clk,
174 	&tc5_clk,
175 	&ohci_clk,
176 	&ether_clk,
177 	// irq0 .. irq6
178 };
179 
180 static struct clk_lookup periph_clocks_lookups[] = {
181 	CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
182 	CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
183 	CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
184 	CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
185 	CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
186 	CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
187 	CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
188 	CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
189 	CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk),
190 	CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200.0", &twi_clk),
191 	/* fake hclk clock */
192 	CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
193 	CLKDEV_CON_ID("pioA", &pioA_clk),
194 	CLKDEV_CON_ID("pioB", &pioB_clk),
195 	CLKDEV_CON_ID("pioC", &pioC_clk),
196 	CLKDEV_CON_ID("pioD", &pioD_clk),
197 	/* usart lookup table for DT entries */
198 	CLKDEV_CON_DEV_ID("usart", "fffff200.serial", &mck),
199 	CLKDEV_CON_DEV_ID("usart", "fffc0000.serial", &usart0_clk),
200 	CLKDEV_CON_DEV_ID("usart", "fffc4000.serial", &usart1_clk),
201 	CLKDEV_CON_DEV_ID("usart", "fffc8000.serial", &usart2_clk),
202 	CLKDEV_CON_DEV_ID("usart", "fffcc000.serial", &usart3_clk),
203 	/* tc lookup table for DT entries */
204 	CLKDEV_CON_DEV_ID("t0_clk", "fffa0000.timer", &tc0_clk),
205 	CLKDEV_CON_DEV_ID("t1_clk", "fffa0000.timer", &tc1_clk),
206 	CLKDEV_CON_DEV_ID("t2_clk", "fffa0000.timer", &tc2_clk),
207 	CLKDEV_CON_DEV_ID("t0_clk", "fffa4000.timer", &tc3_clk),
208 	CLKDEV_CON_DEV_ID("t1_clk", "fffa4000.timer", &tc4_clk),
209 	CLKDEV_CON_DEV_ID("t2_clk", "fffa4000.timer", &tc5_clk),
210 	CLKDEV_CON_DEV_ID("hclk", "300000.ohci", &ohci_clk),
211 	CLKDEV_CON_DEV_ID(NULL, "fffff400.gpio", &pioA_clk),
212 	CLKDEV_CON_DEV_ID(NULL, "fffff600.gpio", &pioB_clk),
213 	CLKDEV_CON_DEV_ID(NULL, "fffff800.gpio", &pioC_clk),
214 	CLKDEV_CON_DEV_ID(NULL, "fffffa00.gpio", &pioD_clk),
215 };
216 
217 static struct clk_lookup usart_clocks_lookups[] = {
218 	CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
219 	CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
220 	CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
221 	CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
222 	CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
223 };
224 
225 /*
226  * The four programmable clocks.
227  * You must configure pin multiplexing to bring these signals out.
228  */
229 static struct clk pck0 = {
230 	.name		= "pck0",
231 	.pmc_mask	= AT91_PMC_PCK0,
232 	.type		= CLK_TYPE_PROGRAMMABLE,
233 	.id		= 0,
234 };
235 static struct clk pck1 = {
236 	.name		= "pck1",
237 	.pmc_mask	= AT91_PMC_PCK1,
238 	.type		= CLK_TYPE_PROGRAMMABLE,
239 	.id		= 1,
240 };
241 static struct clk pck2 = {
242 	.name		= "pck2",
243 	.pmc_mask	= AT91_PMC_PCK2,
244 	.type		= CLK_TYPE_PROGRAMMABLE,
245 	.id		= 2,
246 };
247 static struct clk pck3 = {
248 	.name		= "pck3",
249 	.pmc_mask	= AT91_PMC_PCK3,
250 	.type		= CLK_TYPE_PROGRAMMABLE,
251 	.id		= 3,
252 };
253 
254 static void __init at91rm9200_register_clocks(void)
255 {
256 	int i;
257 
258 	for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
259 		clk_register(periph_clocks[i]);
260 
261 	clkdev_add_table(periph_clocks_lookups,
262 			 ARRAY_SIZE(periph_clocks_lookups));
263 	clkdev_add_table(usart_clocks_lookups,
264 			 ARRAY_SIZE(usart_clocks_lookups));
265 
266 	clk_register(&pck0);
267 	clk_register(&pck1);
268 	clk_register(&pck2);
269 	clk_register(&pck3);
270 }
271 
272 /* --------------------------------------------------------------------
273  *  GPIO
274  * -------------------------------------------------------------------- */
275 
276 static struct at91_gpio_bank at91rm9200_gpio[] __initdata = {
277 	{
278 		.id		= AT91RM9200_ID_PIOA,
279 		.regbase	= AT91RM9200_BASE_PIOA,
280 	}, {
281 		.id		= AT91RM9200_ID_PIOB,
282 		.regbase	= AT91RM9200_BASE_PIOB,
283 	}, {
284 		.id		= AT91RM9200_ID_PIOC,
285 		.regbase	= AT91RM9200_BASE_PIOC,
286 	}, {
287 		.id		= AT91RM9200_ID_PIOD,
288 		.regbase	= AT91RM9200_BASE_PIOD,
289 	}
290 };
291 
292 static void at91rm9200_idle(void)
293 {
294 	/*
295 	 * Disable the processor clock.  The processor will be automatically
296 	 * re-enabled by an interrupt or by a reset.
297 	 */
298 	at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
299 }
300 
301 static void at91rm9200_restart(char mode, const char *cmd)
302 {
303 	/*
304 	 * Perform a hardware reset with the use of the Watchdog timer.
305 	 */
306 	at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
307 	at91_st_write(AT91_ST_CR, AT91_ST_WDRST);
308 }
309 
310 /* --------------------------------------------------------------------
311  *  AT91RM9200 processor initialization
312  * -------------------------------------------------------------------- */
313 static void __init at91rm9200_map_io(void)
314 {
315 	/* Map peripherals */
316 	at91_init_sram(0, AT91RM9200_SRAM_BASE, AT91RM9200_SRAM_SIZE);
317 }
318 
319 static void __init at91rm9200_ioremap_registers(void)
320 {
321 	at91rm9200_ioremap_st(AT91RM9200_BASE_ST);
322 	at91_ioremap_ramc(0, AT91RM9200_BASE_MC, 256);
323 }
324 
325 static void __init at91rm9200_initialize(void)
326 {
327 	arm_pm_idle = at91rm9200_idle;
328 	arm_pm_restart = at91rm9200_restart;
329 	at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
330 			| (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
331 			| (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
332 			| (1 << AT91RM9200_ID_IRQ6);
333 
334 	/* Initialize GPIO subsystem */
335 	at91_gpio_init(at91rm9200_gpio,
336 		cpu_is_at91rm9200_bga() ? AT91RM9200_BGA : AT91RM9200_PQFP);
337 }
338 
339 
340 /* --------------------------------------------------------------------
341  *  Interrupt initialization
342  * -------------------------------------------------------------------- */
343 
344 /*
345  * The default interrupt priority levels (0 = lowest, 7 = highest).
346  */
347 static unsigned int at91rm9200_default_irq_priority[NR_AIC_IRQS] __initdata = {
348 	7,	/* Advanced Interrupt Controller (FIQ) */
349 	7,	/* System Peripherals */
350 	1,	/* Parallel IO Controller A */
351 	1,	/* Parallel IO Controller B */
352 	1,	/* Parallel IO Controller C */
353 	1,	/* Parallel IO Controller D */
354 	5,	/* USART 0 */
355 	5,	/* USART 1 */
356 	5,	/* USART 2 */
357 	5,	/* USART 3 */
358 	0,	/* Multimedia Card Interface */
359 	2,	/* USB Device Port */
360 	6,	/* Two-Wire Interface */
361 	5,	/* Serial Peripheral Interface */
362 	4,	/* Serial Synchronous Controller 0 */
363 	4,	/* Serial Synchronous Controller 1 */
364 	4,	/* Serial Synchronous Controller 2 */
365 	0,	/* Timer Counter 0 */
366 	0,	/* Timer Counter 1 */
367 	0,	/* Timer Counter 2 */
368 	0,	/* Timer Counter 3 */
369 	0,	/* Timer Counter 4 */
370 	0,	/* Timer Counter 5 */
371 	2,	/* USB Host port */
372 	3,	/* Ethernet MAC */
373 	0,	/* Advanced Interrupt Controller (IRQ0) */
374 	0,	/* Advanced Interrupt Controller (IRQ1) */
375 	0,	/* Advanced Interrupt Controller (IRQ2) */
376 	0,	/* Advanced Interrupt Controller (IRQ3) */
377 	0,	/* Advanced Interrupt Controller (IRQ4) */
378 	0,	/* Advanced Interrupt Controller (IRQ5) */
379 	0	/* Advanced Interrupt Controller (IRQ6) */
380 };
381 
382 AT91_SOC_START(rm9200)
383 	.map_io = at91rm9200_map_io,
384 	.default_irq_priority = at91rm9200_default_irq_priority,
385 	.ioremap_registers = at91rm9200_ioremap_registers,
386 	.register_clocks = at91rm9200_register_clocks,
387 	.init = at91rm9200_initialize,
388 AT91_SOC_END
389