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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-sa1100/generic.c | |
3 | * | |
4 | * Author: Nicolas Pitre | |
5 | * | |
6 | * Code common to all SA11x0 machines. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
2f8163ba | 12 | #include <linux/gpio.h> |
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/kernel.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/pm.h> | |
18 | #include <linux/cpufreq.h> | |
19 | #include <linux/ioport.h> | |
d052d1be | 20 | #include <linux/platform_device.h> |
1da177e4 LT |
21 | |
22 | #include <asm/div64.h> | |
a09e64fb | 23 | #include <mach/hardware.h> |
1da177e4 | 24 | #include <asm/system.h> |
1da177e4 | 25 | #include <asm/mach/map.h> |
14e66f76 | 26 | #include <asm/mach/flash.h> |
1da177e4 LT |
27 | #include <asm/irq.h> |
28 | ||
29 | #include "generic.h" | |
30 | ||
04fef228 EM |
31 | unsigned int reset_status; |
32 | EXPORT_SYMBOL(reset_status); | |
33 | ||
1da177e4 LT |
34 | #define NR_FREQS 16 |
35 | ||
36 | /* | |
37 | * This table is setup for a 3.6864MHz Crystal. | |
38 | */ | |
39 | static const unsigned short cclk_frequency_100khz[NR_FREQS] = { | |
40 | 590, /* 59.0 MHz */ | |
41 | 737, /* 73.7 MHz */ | |
bda03086 | 42 | 885, /* 88.5 MHz */ |
1da177e4 LT |
43 | 1032, /* 103.2 MHz */ |
44 | 1180, /* 118.0 MHz */ | |
45 | 1327, /* 132.7 MHz */ | |
46 | 1475, /* 147.5 MHz */ | |
47 | 1622, /* 162.2 MHz */ | |
48 | 1769, /* 176.9 MHz */ | |
49 | 1917, /* 191.7 MHz */ | |
50 | 2064, /* 206.4 MHz */ | |
51 | 2212, /* 221.2 MHz */ | |
bda03086 KE |
52 | 2359, /* 235.9 MHz */ |
53 | 2507, /* 250.7 MHz */ | |
54 | 2654, /* 265.4 MHz */ | |
55 | 2802 /* 280.2 MHz */ | |
1da177e4 LT |
56 | }; |
57 | ||
1da177e4 LT |
58 | /* rounds up(!) */ |
59 | unsigned int sa11x0_freq_to_ppcr(unsigned int khz) | |
60 | { | |
61 | int i; | |
62 | ||
63 | khz /= 100; | |
64 | ||
65 | for (i = 0; i < NR_FREQS; i++) | |
66 | if (cclk_frequency_100khz[i] >= khz) | |
67 | break; | |
68 | ||
69 | return i; | |
70 | } | |
71 | ||
72 | unsigned int sa11x0_ppcr_to_freq(unsigned int idx) | |
73 | { | |
74 | unsigned int freq = 0; | |
75 | if (idx < NR_FREQS) | |
76 | freq = cclk_frequency_100khz[idx] * 100; | |
77 | return freq; | |
78 | } | |
79 | ||
80 | ||
81 | /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on | |
82 | * this platform, anyway. | |
83 | */ | |
84 | int sa11x0_verify_speed(struct cpufreq_policy *policy) | |
85 | { | |
86 | unsigned int tmp; | |
87 | if (policy->cpu) | |
88 | return -EINVAL; | |
89 | ||
90 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); | |
91 | ||
92 | /* make sure that at least one frequency is within the policy */ | |
93 | tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100; | |
94 | if (tmp > policy->max) | |
95 | policy->max = tmp; | |
96 | ||
97 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | unsigned int sa11x0_getspeed(unsigned int cpu) | |
103 | { | |
104 | if (cpu) | |
105 | return 0; | |
106 | return cclk_frequency_100khz[PPCR & 0xf] * 100; | |
107 | } | |
108 | ||
1da177e4 LT |
109 | /* |
110 | * Default power-off for SA1100 | |
111 | */ | |
112 | static void sa1100_power_off(void) | |
113 | { | |
114 | mdelay(100); | |
115 | local_irq_disable(); | |
116 | /* disable internal oscillator, float CS lines */ | |
117 | PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS); | |
118 | /* enable wake-up on GPIO0 (Assabet...) */ | |
119 | PWER = GFER = GRER = 1; | |
120 | /* | |
121 | * set scratchpad to zero, just in case it is used as a | |
122 | * restart address by the bootloader. | |
123 | */ | |
124 | PSPR = 0; | |
125 | /* enter sleep mode */ | |
126 | PMCR = PMCR_SF; | |
127 | } | |
128 | ||
7a5b4e16 RK |
129 | static void sa11x0_register_device(struct platform_device *dev, void *data) |
130 | { | |
131 | int err; | |
132 | dev->dev.platform_data = data; | |
133 | err = platform_device_register(dev); | |
134 | if (err) | |
135 | printk(KERN_ERR "Unable to register device %s: %d\n", | |
136 | dev->name, err); | |
137 | } | |
138 | ||
139 | ||
1da177e4 LT |
140 | static struct resource sa11x0udc_resources[] = { |
141 | [0] = { | |
cf562b4a JF |
142 | .start = __PREG(Ser0UDCCR), |
143 | .end = __PREG(Ser0UDCCR) + 0xffff, | |
1da177e4 LT |
144 | .flags = IORESOURCE_MEM, |
145 | }, | |
cf562b4a JF |
146 | [1] = { |
147 | .start = IRQ_Ser0UDC, | |
148 | .end = IRQ_Ser0UDC, | |
149 | .flags = IORESOURCE_IRQ, | |
150 | }, | |
1da177e4 LT |
151 | }; |
152 | ||
153 | static u64 sa11x0udc_dma_mask = 0xffffffffUL; | |
154 | ||
155 | static struct platform_device sa11x0udc_device = { | |
156 | .name = "sa11x0-udc", | |
157 | .id = -1, | |
158 | .dev = { | |
159 | .dma_mask = &sa11x0udc_dma_mask, | |
160 | .coherent_dma_mask = 0xffffffff, | |
161 | }, | |
162 | .num_resources = ARRAY_SIZE(sa11x0udc_resources), | |
163 | .resource = sa11x0udc_resources, | |
164 | }; | |
165 | ||
166 | static struct resource sa11x0uart1_resources[] = { | |
167 | [0] = { | |
cf562b4a JF |
168 | .start = __PREG(Ser1UTCR0), |
169 | .end = __PREG(Ser1UTCR0) + 0xffff, | |
1da177e4 LT |
170 | .flags = IORESOURCE_MEM, |
171 | }, | |
cf562b4a JF |
172 | [1] = { |
173 | .start = IRQ_Ser1UART, | |
174 | .end = IRQ_Ser1UART, | |
175 | .flags = IORESOURCE_IRQ, | |
176 | }, | |
1da177e4 LT |
177 | }; |
178 | ||
179 | static struct platform_device sa11x0uart1_device = { | |
180 | .name = "sa11x0-uart", | |
181 | .id = 1, | |
182 | .num_resources = ARRAY_SIZE(sa11x0uart1_resources), | |
183 | .resource = sa11x0uart1_resources, | |
184 | }; | |
185 | ||
186 | static struct resource sa11x0uart3_resources[] = { | |
187 | [0] = { | |
cf562b4a JF |
188 | .start = __PREG(Ser3UTCR0), |
189 | .end = __PREG(Ser3UTCR0) + 0xffff, | |
1da177e4 LT |
190 | .flags = IORESOURCE_MEM, |
191 | }, | |
cf562b4a JF |
192 | [1] = { |
193 | .start = IRQ_Ser3UART, | |
194 | .end = IRQ_Ser3UART, | |
195 | .flags = IORESOURCE_IRQ, | |
196 | }, | |
1da177e4 LT |
197 | }; |
198 | ||
199 | static struct platform_device sa11x0uart3_device = { | |
200 | .name = "sa11x0-uart", | |
201 | .id = 3, | |
202 | .num_resources = ARRAY_SIZE(sa11x0uart3_resources), | |
203 | .resource = sa11x0uart3_resources, | |
204 | }; | |
205 | ||
206 | static struct resource sa11x0mcp_resources[] = { | |
207 | [0] = { | |
cf562b4a JF |
208 | .start = __PREG(Ser4MCCR0), |
209 | .end = __PREG(Ser4MCCR0) + 0xffff, | |
1da177e4 LT |
210 | .flags = IORESOURCE_MEM, |
211 | }, | |
cf562b4a JF |
212 | [1] = { |
213 | .start = IRQ_Ser4MCP, | |
214 | .end = IRQ_Ser4MCP, | |
215 | .flags = IORESOURCE_IRQ, | |
216 | }, | |
1da177e4 LT |
217 | }; |
218 | ||
219 | static u64 sa11x0mcp_dma_mask = 0xffffffffUL; | |
220 | ||
221 | static struct platform_device sa11x0mcp_device = { | |
222 | .name = "sa11x0-mcp", | |
223 | .id = -1, | |
224 | .dev = { | |
225 | .dma_mask = &sa11x0mcp_dma_mask, | |
226 | .coherent_dma_mask = 0xffffffff, | |
227 | }, | |
228 | .num_resources = ARRAY_SIZE(sa11x0mcp_resources), | |
229 | .resource = sa11x0mcp_resources, | |
230 | }; | |
231 | ||
7a5b4e16 | 232 | void sa11x0_register_mcp(struct mcp_plat_data *data) |
323cdfc1 | 233 | { |
7a5b4e16 | 234 | sa11x0_register_device(&sa11x0mcp_device, data); |
323cdfc1 RK |
235 | } |
236 | ||
1da177e4 LT |
237 | static struct resource sa11x0ssp_resources[] = { |
238 | [0] = { | |
239 | .start = 0x80070000, | |
240 | .end = 0x8007ffff, | |
241 | .flags = IORESOURCE_MEM, | |
242 | }, | |
cf562b4a JF |
243 | [1] = { |
244 | .start = IRQ_Ser4SSP, | |
245 | .end = IRQ_Ser4SSP, | |
246 | .flags = IORESOURCE_IRQ, | |
247 | }, | |
1da177e4 LT |
248 | }; |
249 | ||
250 | static u64 sa11x0ssp_dma_mask = 0xffffffffUL; | |
251 | ||
252 | static struct platform_device sa11x0ssp_device = { | |
253 | .name = "sa11x0-ssp", | |
254 | .id = -1, | |
255 | .dev = { | |
256 | .dma_mask = &sa11x0ssp_dma_mask, | |
257 | .coherent_dma_mask = 0xffffffff, | |
258 | }, | |
259 | .num_resources = ARRAY_SIZE(sa11x0ssp_resources), | |
260 | .resource = sa11x0ssp_resources, | |
261 | }; | |
262 | ||
263 | static struct resource sa11x0fb_resources[] = { | |
264 | [0] = { | |
265 | .start = 0xb0100000, | |
266 | .end = 0xb010ffff, | |
267 | .flags = IORESOURCE_MEM, | |
268 | }, | |
269 | [1] = { | |
270 | .start = IRQ_LCD, | |
271 | .end = IRQ_LCD, | |
272 | .flags = IORESOURCE_IRQ, | |
273 | }, | |
274 | }; | |
275 | ||
276 | static struct platform_device sa11x0fb_device = { | |
277 | .name = "sa11x0-fb", | |
278 | .id = -1, | |
279 | .dev = { | |
280 | .coherent_dma_mask = 0xffffffff, | |
281 | }, | |
282 | .num_resources = ARRAY_SIZE(sa11x0fb_resources), | |
283 | .resource = sa11x0fb_resources, | |
284 | }; | |
285 | ||
286 | static struct platform_device sa11x0pcmcia_device = { | |
287 | .name = "sa11x0-pcmcia", | |
288 | .id = -1, | |
289 | }; | |
290 | ||
291 | static struct platform_device sa11x0mtd_device = { | |
bcc8f3e0 | 292 | .name = "sa1100-mtd", |
1da177e4 LT |
293 | .id = -1, |
294 | }; | |
295 | ||
7a5b4e16 RK |
296 | void sa11x0_register_mtd(struct flash_platform_data *flash, |
297 | struct resource *res, int nr) | |
1da177e4 | 298 | { |
14e66f76 | 299 | flash->name = "sa1100"; |
1da177e4 LT |
300 | sa11x0mtd_device.resource = res; |
301 | sa11x0mtd_device.num_resources = nr; | |
7a5b4e16 | 302 | sa11x0_register_device(&sa11x0mtd_device, flash); |
1da177e4 LT |
303 | } |
304 | ||
305 | static struct resource sa11x0ir_resources[] = { | |
306 | { | |
307 | .start = __PREG(Ser2UTCR0), | |
308 | .end = __PREG(Ser2UTCR0) + 0x24 - 1, | |
309 | .flags = IORESOURCE_MEM, | |
310 | }, { | |
311 | .start = __PREG(Ser2HSCR0), | |
312 | .end = __PREG(Ser2HSCR0) + 0x1c - 1, | |
313 | .flags = IORESOURCE_MEM, | |
314 | }, { | |
315 | .start = __PREG(Ser2HSCR2), | |
316 | .end = __PREG(Ser2HSCR2) + 0x04 - 1, | |
317 | .flags = IORESOURCE_MEM, | |
318 | }, { | |
319 | .start = IRQ_Ser2ICP, | |
320 | .end = IRQ_Ser2ICP, | |
321 | .flags = IORESOURCE_IRQ, | |
322 | } | |
323 | }; | |
324 | ||
325 | static struct platform_device sa11x0ir_device = { | |
326 | .name = "sa11x0-ir", | |
327 | .id = -1, | |
328 | .num_resources = ARRAY_SIZE(sa11x0ir_resources), | |
329 | .resource = sa11x0ir_resources, | |
330 | }; | |
331 | ||
7a5b4e16 | 332 | void sa11x0_register_irda(struct irda_platform_data *irda) |
1da177e4 | 333 | { |
7a5b4e16 | 334 | sa11x0_register_device(&sa11x0ir_device, irda); |
1da177e4 LT |
335 | } |
336 | ||
e842f1c8 RP |
337 | static struct platform_device sa11x0rtc_device = { |
338 | .name = "sa1100-rtc", | |
339 | .id = -1, | |
340 | }; | |
341 | ||
1da177e4 LT |
342 | static struct platform_device *sa11x0_devices[] __initdata = { |
343 | &sa11x0udc_device, | |
344 | &sa11x0uart1_device, | |
345 | &sa11x0uart3_device, | |
1da177e4 LT |
346 | &sa11x0ssp_device, |
347 | &sa11x0pcmcia_device, | |
348 | &sa11x0fb_device, | |
e842f1c8 | 349 | &sa11x0rtc_device, |
1da177e4 LT |
350 | }; |
351 | ||
352 | static int __init sa1100_init(void) | |
353 | { | |
354 | pm_power_off = sa1100_power_off; | |
1da177e4 LT |
355 | return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices)); |
356 | } | |
357 | ||
358 | arch_initcall(sa1100_init); | |
359 | ||
360 | void (*sa1100fb_backlight_power)(int on); | |
361 | void (*sa1100fb_lcd_power)(int on); | |
362 | ||
363 | EXPORT_SYMBOL(sa1100fb_backlight_power); | |
364 | EXPORT_SYMBOL(sa1100fb_lcd_power); | |
365 | ||
366 | ||
367 | /* | |
368 | * Common I/O mapping: | |
369 | * | |
370 | * Typically, static virtual address mappings are as follow: | |
371 | * | |
372 | * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.) | |
373 | * 0xf4000000-0xf4ffffff: SA-1111 | |
374 | * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area) | |
375 | * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above) | |
376 | * 0xffff0000-0xffff0fff: SA1100 exception vectors | |
377 | * 0xffff2000-0xffff2fff: Minicache copy_user_page area | |
378 | * | |
379 | * Below 0xe8000000 is reserved for vm allocation. | |
380 | * | |
381 | * The machine specific code must provide the extra mapping beside the | |
382 | * default mapping provided here. | |
383 | */ | |
384 | ||
385 | static struct map_desc standard_io_desc[] __initdata = { | |
bda03086 | 386 | { /* PCM */ |
92519d82 DS |
387 | .virtual = 0xf8000000, |
388 | .pfn = __phys_to_pfn(0x80000000), | |
389 | .length = 0x00100000, | |
390 | .type = MT_DEVICE | |
391 | }, { /* SCM */ | |
392 | .virtual = 0xfa000000, | |
393 | .pfn = __phys_to_pfn(0x90000000), | |
394 | .length = 0x00100000, | |
395 | .type = MT_DEVICE | |
396 | }, { /* MER */ | |
397 | .virtual = 0xfc000000, | |
398 | .pfn = __phys_to_pfn(0xa0000000), | |
399 | .length = 0x00100000, | |
400 | .type = MT_DEVICE | |
401 | }, { /* LCD + DMA */ | |
402 | .virtual = 0xfe000000, | |
403 | .pfn = __phys_to_pfn(0xb0000000), | |
404 | .length = 0x00200000, | |
405 | .type = MT_DEVICE | |
406 | }, | |
1da177e4 LT |
407 | }; |
408 | ||
409 | void __init sa1100_map_io(void) | |
410 | { | |
411 | iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); | |
412 | } | |
413 | ||
414 | /* | |
415 | * Disable the memory bus request/grant signals on the SA1110 to | |
416 | * ensure that we don't receive spurious memory requests. We set | |
417 | * the MBGNT signal false to ensure the SA1111 doesn't own the | |
418 | * SDRAM bus. | |
419 | */ | |
420 | void __init sa1110_mb_disable(void) | |
421 | { | |
422 | unsigned long flags; | |
423 | ||
424 | local_irq_save(flags); | |
425 | ||
426 | PGSR &= ~GPIO_MBGNT; | |
427 | GPCR = GPIO_MBGNT; | |
428 | GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; | |
429 | ||
430 | GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ); | |
431 | ||
432 | local_irq_restore(flags); | |
433 | } | |
434 | ||
435 | /* | |
436 | * If the system is going to use the SA-1111 DMA engines, set up | |
437 | * the memory bus request/grant pins. | |
438 | */ | |
85e6c7a7 | 439 | void __devinit sa1110_mb_enable(void) |
1da177e4 LT |
440 | { |
441 | unsigned long flags; | |
442 | ||
443 | local_irq_save(flags); | |
444 | ||
445 | PGSR &= ~GPIO_MBGNT; | |
446 | GPCR = GPIO_MBGNT; | |
447 | GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; | |
448 | ||
449 | GAFR |= (GPIO_MBGNT | GPIO_MBREQ); | |
450 | TUCR |= TUCR_MR; | |
451 | ||
452 | local_irq_restore(flags); | |
453 | } | |
454 |