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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-pxa/generic.c | |
3 | * | |
4 | * Author: Nicolas Pitre | |
5 | * Created: Jun 15, 2001 | |
6 | * Copyright: MontaVista Software Inc. | |
7 | * | |
8 | * Code common to all PXA machines. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * Since this file should be linked before any other machine specific file, | |
15 | * the __initcall() here will be executed first. This serves as default | |
16 | * initialization stuff for PXA machines which can be overridden later if | |
17 | * need be. | |
18 | */ | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/delay.h> | |
d052d1be | 23 | #include <linux/platform_device.h> |
1da177e4 LT |
24 | #include <linux/ioport.h> |
25 | #include <linux/pm.h> | |
4e57b681 | 26 | #include <linux/string.h> |
1da177e4 | 27 | |
2dc20a51 NP |
28 | #include <linux/sched.h> |
29 | #include <asm/cnt32_to_63.h> | |
30 | #include <asm/div64.h> | |
31 | ||
1da177e4 LT |
32 | #include <asm/hardware.h> |
33 | #include <asm/irq.h> | |
34 | #include <asm/system.h> | |
35 | #include <asm/pgtable.h> | |
36 | #include <asm/mach/map.h> | |
37 | ||
38 | #include <asm/arch/pxa-regs.h> | |
3deac046 | 39 | #include <asm/arch/gpio.h> |
1da177e4 LT |
40 | #include <asm/arch/udc.h> |
41 | #include <asm/arch/pxafb.h> | |
42 | #include <asm/arch/mmc.h> | |
6f475c01 | 43 | #include <asm/arch/irda.h> |
eb9181a2 | 44 | #include <asm/arch/i2c.h> |
1da177e4 LT |
45 | |
46 | #include "generic.h" | |
47 | ||
2dc20a51 NP |
48 | /* |
49 | * This is the PXA2xx sched_clock implementation. This has a resolution | |
50 | * of at least 308ns and a maximum value that depends on the value of | |
51 | * CLOCK_TICK_RATE. | |
52 | * | |
53 | * The return value is guaranteed to be monotonic in that range as | |
54 | * long as there is always less than 582 seconds between successive | |
55 | * calls to this function. | |
56 | */ | |
57 | unsigned long long sched_clock(void) | |
58 | { | |
59 | unsigned long long v = cnt32_to_63(OSCR); | |
60 | /* Note: top bit ov v needs cleared unless multiplier is even. */ | |
61 | ||
62 | #if CLOCK_TICK_RATE == 3686400 | |
63 | /* 1E9 / 3686400 => 78125 / 288, max value = 32025597s (370 days). */ | |
64 | /* The <<1 is used to get rid of tick.hi top bit */ | |
65 | v *= 78125<<1; | |
66 | do_div(v, 288<<1); | |
67 | #elif CLOCK_TICK_RATE == 3250000 | |
68 | /* 1E9 / 3250000 => 4000 / 13, max value = 709490156s (8211 days) */ | |
69 | v *= 4000; | |
70 | do_div(v, 13); | |
71 | #elif CLOCK_TICK_RATE == 3249600 | |
72 | /* 1E9 / 3249600 => 625000 / 2031, max value = 4541295s (52 days) */ | |
73 | v *= 625000; | |
74 | do_div(v, 2031); | |
75 | #else | |
76 | #warning "consider fixing sched_clock for your value of CLOCK_TICK_RATE" | |
77 | /* | |
78 | * 96-bit math to perform tick * NSEC_PER_SEC / CLOCK_TICK_RATE for | |
79 | * any value of CLOCK_TICK_RATE. Max value is in the 80 thousand | |
0c48d314 NP |
80 | * years range and truncation to unsigned long long limits it to |
81 | * sched_clock's max range of ~584 years. This is nice but with | |
82 | * higher computation cost. | |
2dc20a51 NP |
83 | */ |
84 | { | |
85 | union { | |
86 | unsigned long long val; | |
87 | struct { unsigned long lo, hi; }; | |
88 | } x; | |
89 | unsigned long long y; | |
90 | ||
91 | x.val = v; | |
92 | x.hi &= 0x7fffffff; | |
93 | y = (unsigned long long)x.lo * NSEC_PER_SEC; | |
94 | x.lo = y; | |
95 | y = (y >> 32) + (unsigned long long)x.hi * NSEC_PER_SEC; | |
96 | x.hi = do_div(y, CLOCK_TICK_RATE); | |
97 | do_div(x.val, CLOCK_TICK_RATE); | |
98 | x.hi += y; | |
99 | v = x.val; | |
100 | } | |
101 | #endif | |
102 | ||
103 | return v; | |
104 | } | |
105 | ||
1da177e4 LT |
106 | /* |
107 | * Handy function to set GPIO alternate functions | |
108 | */ | |
109 | ||
3deac046 | 110 | int pxa_gpio_mode(int gpio_mode) |
1da177e4 LT |
111 | { |
112 | unsigned long flags; | |
113 | int gpio = gpio_mode & GPIO_MD_MASK_NR; | |
114 | int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8; | |
115 | int gafr; | |
116 | ||
3deac046 PZ |
117 | if (gpio > PXA_LAST_GPIO) |
118 | return -EINVAL; | |
119 | ||
1da177e4 LT |
120 | local_irq_save(flags); |
121 | if (gpio_mode & GPIO_DFLT_LOW) | |
122 | GPCR(gpio) = GPIO_bit(gpio); | |
123 | else if (gpio_mode & GPIO_DFLT_HIGH) | |
124 | GPSR(gpio) = GPIO_bit(gpio); | |
125 | if (gpio_mode & GPIO_MD_MASK_DIR) | |
126 | GPDR(gpio) |= GPIO_bit(gpio); | |
127 | else | |
128 | GPDR(gpio) &= ~GPIO_bit(gpio); | |
129 | gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2)); | |
130 | GAFR(gpio) = gafr | (fn << (((gpio) & 0xf)*2)); | |
131 | local_irq_restore(flags); | |
3deac046 PZ |
132 | |
133 | return 0; | |
1da177e4 LT |
134 | } |
135 | ||
136 | EXPORT_SYMBOL(pxa_gpio_mode); | |
137 | ||
3deac046 PZ |
138 | /* |
139 | * Return GPIO level | |
140 | */ | |
141 | int pxa_gpio_get_value(unsigned gpio) | |
142 | { | |
143 | return __gpio_get_value(gpio); | |
144 | } | |
145 | ||
146 | EXPORT_SYMBOL(pxa_gpio_get_value); | |
147 | ||
148 | /* | |
149 | * Set output GPIO level | |
150 | */ | |
151 | void pxa_gpio_set_value(unsigned gpio, int value) | |
152 | { | |
153 | __gpio_set_value(gpio, value); | |
154 | } | |
155 | ||
156 | EXPORT_SYMBOL(pxa_gpio_set_value); | |
157 | ||
1da177e4 LT |
158 | /* |
159 | * Routine to safely enable or disable a clock in the CKEN | |
160 | */ | |
161 | void pxa_set_cken(int clock, int enable) | |
162 | { | |
163 | unsigned long flags; | |
164 | local_irq_save(flags); | |
165 | ||
166 | if (enable) | |
167 | CKEN |= clock; | |
168 | else | |
169 | CKEN &= ~clock; | |
170 | ||
171 | local_irq_restore(flags); | |
172 | } | |
173 | ||
174 | EXPORT_SYMBOL(pxa_set_cken); | |
175 | ||
176 | /* | |
177 | * Intel PXA2xx internal register mapping. | |
178 | * | |
179 | * Note 1: not all PXA2xx variants implement all those addresses. | |
180 | * | |
181 | * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table | |
182 | * and cache flush area. | |
183 | */ | |
184 | static struct map_desc standard_io_desc[] __initdata = { | |
6f9182eb DS |
185 | { /* Devs */ |
186 | .virtual = 0xf2000000, | |
187 | .pfn = __phys_to_pfn(0x40000000), | |
188 | .length = 0x02000000, | |
189 | .type = MT_DEVICE | |
190 | }, { /* LCD */ | |
191 | .virtual = 0xf4000000, | |
192 | .pfn = __phys_to_pfn(0x44000000), | |
193 | .length = 0x00100000, | |
194 | .type = MT_DEVICE | |
195 | }, { /* Mem Ctl */ | |
196 | .virtual = 0xf6000000, | |
197 | .pfn = __phys_to_pfn(0x48000000), | |
198 | .length = 0x00100000, | |
199 | .type = MT_DEVICE | |
200 | }, { /* USB host */ | |
201 | .virtual = 0xf8000000, | |
202 | .pfn = __phys_to_pfn(0x4c000000), | |
203 | .length = 0x00100000, | |
204 | .type = MT_DEVICE | |
205 | }, { /* Camera */ | |
206 | .virtual = 0xfa000000, | |
207 | .pfn = __phys_to_pfn(0x50000000), | |
208 | .length = 0x00100000, | |
209 | .type = MT_DEVICE | |
210 | }, { /* IMem ctl */ | |
211 | .virtual = 0xfe000000, | |
212 | .pfn = __phys_to_pfn(0x58000000), | |
213 | .length = 0x00100000, | |
214 | .type = MT_DEVICE | |
215 | }, { /* UNCACHED_PHYS_0 */ | |
216 | .virtual = 0xff000000, | |
217 | .pfn = __phys_to_pfn(0x00000000), | |
218 | .length = 0x00100000, | |
219 | .type = MT_DEVICE | |
220 | } | |
1da177e4 LT |
221 | }; |
222 | ||
223 | void __init pxa_map_io(void) | |
224 | { | |
225 | iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); | |
226 | get_clk_frequency_khz(1); | |
227 | } | |
228 | ||
229 | ||
230 | static struct resource pxamci_resources[] = { | |
231 | [0] = { | |
232 | .start = 0x41100000, | |
233 | .end = 0x41100fff, | |
234 | .flags = IORESOURCE_MEM, | |
235 | }, | |
236 | [1] = { | |
237 | .start = IRQ_MMC, | |
238 | .end = IRQ_MMC, | |
239 | .flags = IORESOURCE_IRQ, | |
240 | }, | |
241 | }; | |
242 | ||
243 | static u64 pxamci_dmamask = 0xffffffffUL; | |
244 | ||
245 | static struct platform_device pxamci_device = { | |
246 | .name = "pxa2xx-mci", | |
247 | .id = -1, | |
248 | .dev = { | |
249 | .dma_mask = &pxamci_dmamask, | |
250 | .coherent_dma_mask = 0xffffffff, | |
251 | }, | |
252 | .num_resources = ARRAY_SIZE(pxamci_resources), | |
253 | .resource = pxamci_resources, | |
254 | }; | |
255 | ||
256 | void __init pxa_set_mci_info(struct pxamci_platform_data *info) | |
257 | { | |
258 | pxamci_device.dev.platform_data = info; | |
259 | } | |
260 | ||
261 | ||
262 | static struct pxa2xx_udc_mach_info pxa_udc_info; | |
263 | ||
264 | void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info) | |
265 | { | |
266 | memcpy(&pxa_udc_info, info, sizeof *info); | |
267 | } | |
268 | ||
269 | static struct resource pxa2xx_udc_resources[] = { | |
270 | [0] = { | |
271 | .start = 0x40600000, | |
272 | .end = 0x4060ffff, | |
273 | .flags = IORESOURCE_MEM, | |
274 | }, | |
275 | [1] = { | |
276 | .start = IRQ_USB, | |
277 | .end = IRQ_USB, | |
278 | .flags = IORESOURCE_IRQ, | |
279 | }, | |
280 | }; | |
281 | ||
282 | static u64 udc_dma_mask = ~(u32)0; | |
283 | ||
284 | static struct platform_device udc_device = { | |
285 | .name = "pxa2xx-udc", | |
286 | .id = -1, | |
287 | .resource = pxa2xx_udc_resources, | |
288 | .num_resources = ARRAY_SIZE(pxa2xx_udc_resources), | |
289 | .dev = { | |
290 | .platform_data = &pxa_udc_info, | |
291 | .dma_mask = &udc_dma_mask, | |
292 | } | |
293 | }; | |
294 | ||
1da177e4 LT |
295 | static struct resource pxafb_resources[] = { |
296 | [0] = { | |
297 | .start = 0x44000000, | |
298 | .end = 0x4400ffff, | |
299 | .flags = IORESOURCE_MEM, | |
300 | }, | |
301 | [1] = { | |
302 | .start = IRQ_LCD, | |
303 | .end = IRQ_LCD, | |
304 | .flags = IORESOURCE_IRQ, | |
305 | }, | |
306 | }; | |
307 | ||
308 | static u64 fb_dma_mask = ~(u64)0; | |
309 | ||
310 | static struct platform_device pxafb_device = { | |
311 | .name = "pxa2xx-fb", | |
312 | .id = -1, | |
313 | .dev = { | |
1da177e4 LT |
314 | .dma_mask = &fb_dma_mask, |
315 | .coherent_dma_mask = 0xffffffff, | |
316 | }, | |
317 | .num_resources = ARRAY_SIZE(pxafb_resources), | |
318 | .resource = pxafb_resources, | |
319 | }; | |
320 | ||
d14b272b RP |
321 | void __init set_pxa_fb_info(struct pxafb_mach_info *info) |
322 | { | |
323 | pxafb_device.dev.platform_data = info; | |
324 | } | |
325 | ||
cb38c569 RP |
326 | void __init set_pxa_fb_parent(struct device *parent_dev) |
327 | { | |
328 | pxafb_device.dev.parent = parent_dev; | |
329 | } | |
330 | ||
1da177e4 LT |
331 | static struct platform_device ffuart_device = { |
332 | .name = "pxa2xx-uart", | |
333 | .id = 0, | |
334 | }; | |
335 | static struct platform_device btuart_device = { | |
336 | .name = "pxa2xx-uart", | |
337 | .id = 1, | |
338 | }; | |
339 | static struct platform_device stuart_device = { | |
340 | .name = "pxa2xx-uart", | |
341 | .id = 2, | |
342 | }; | |
d9e29649 MR |
343 | static struct platform_device hwuart_device = { |
344 | .name = "pxa2xx-uart", | |
345 | .id = 3, | |
346 | }; | |
1da177e4 | 347 | |
bb9bffcb RK |
348 | static struct resource i2c_resources[] = { |
349 | { | |
350 | .start = 0x40301680, | |
351 | .end = 0x403016a3, | |
352 | .flags = IORESOURCE_MEM, | |
353 | }, { | |
354 | .start = IRQ_I2C, | |
355 | .end = IRQ_I2C, | |
356 | .flags = IORESOURCE_IRQ, | |
357 | }, | |
358 | }; | |
359 | ||
360 | static struct platform_device i2c_device = { | |
361 | .name = "pxa2xx-i2c", | |
362 | .id = 0, | |
363 | .resource = i2c_resources, | |
364 | .num_resources = ARRAY_SIZE(i2c_resources), | |
365 | }; | |
366 | ||
a7b4e550 GL |
367 | #ifdef CONFIG_PXA27x |
368 | static struct resource i2c_power_resources[] = { | |
369 | { | |
370 | .start = 0x40f00180, | |
371 | .end = 0x40f001a3, | |
372 | .flags = IORESOURCE_MEM, | |
373 | }, { | |
374 | .start = IRQ_PWRI2C, | |
375 | .end = IRQ_PWRI2C, | |
376 | .flags = IORESOURCE_IRQ, | |
377 | }, | |
378 | }; | |
379 | ||
380 | static struct platform_device i2c_power_device = { | |
381 | .name = "pxa2xx-i2c", | |
382 | .id = 1, | |
383 | .resource = i2c_power_resources, | |
384 | .num_resources = ARRAY_SIZE(i2c_resources), | |
385 | }; | |
386 | #endif | |
387 | ||
bb9bffcb RK |
388 | void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info) |
389 | { | |
390 | i2c_device.dev.platform_data = info; | |
391 | } | |
392 | ||
b2640b42 MR |
393 | static struct resource i2s_resources[] = { |
394 | { | |
395 | .start = 0x40400000, | |
396 | .end = 0x40400083, | |
397 | .flags = IORESOURCE_MEM, | |
398 | }, { | |
399 | .start = IRQ_I2S, | |
400 | .end = IRQ_I2S, | |
401 | .flags = IORESOURCE_IRQ, | |
402 | }, | |
403 | }; | |
404 | ||
405 | static struct platform_device i2s_device = { | |
406 | .name = "pxa2xx-i2s", | |
407 | .id = -1, | |
b5723521 | 408 | .resource = i2s_resources, |
b2640b42 MR |
409 | .num_resources = ARRAY_SIZE(i2s_resources), |
410 | }; | |
411 | ||
6f475c01 NP |
412 | static u64 pxaficp_dmamask = ~(u32)0; |
413 | ||
414 | static struct platform_device pxaficp_device = { | |
415 | .name = "pxa2xx-ir", | |
416 | .id = -1, | |
417 | .dev = { | |
418 | .dma_mask = &pxaficp_dmamask, | |
419 | .coherent_dma_mask = 0xffffffff, | |
420 | }, | |
421 | }; | |
422 | ||
423 | void __init pxa_set_ficp_info(struct pxaficp_platform_data *info) | |
424 | { | |
425 | pxaficp_device.dev.platform_data = info; | |
426 | } | |
427 | ||
e842f1c8 RP |
428 | static struct platform_device pxartc_device = { |
429 | .name = "sa1100-rtc", | |
430 | .id = -1, | |
431 | }; | |
432 | ||
1da177e4 LT |
433 | static struct platform_device *devices[] __initdata = { |
434 | &pxamci_device, | |
435 | &udc_device, | |
436 | &pxafb_device, | |
437 | &ffuart_device, | |
438 | &btuart_device, | |
439 | &stuart_device, | |
6f475c01 | 440 | &pxaficp_device, |
bb9bffcb | 441 | &i2c_device, |
a7b4e550 GL |
442 | #ifdef CONFIG_PXA27x |
443 | &i2c_power_device, | |
444 | #endif | |
b2640b42 | 445 | &i2s_device, |
e842f1c8 | 446 | &pxartc_device, |
1da177e4 LT |
447 | }; |
448 | ||
449 | static int __init pxa_init(void) | |
450 | { | |
d9e29649 MR |
451 | int cpuid, ret; |
452 | ||
453 | ret = platform_add_devices(devices, ARRAY_SIZE(devices)); | |
454 | if (ret) | |
455 | return ret; | |
456 | ||
457 | /* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */ | |
458 | cpuid = read_cpuid(CPUID_ID); | |
459 | if (((cpuid >> 4) & 0xfff) == 0x2d0 || | |
460 | ((cpuid >> 4) & 0xfff) == 0x290) | |
461 | ret = platform_device_register(&hwuart_device); | |
462 | ||
463 | return ret; | |
1da177e4 LT |
464 | } |
465 | ||
466 | subsys_initcall(pxa_init); |