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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 | */ | |
12 | #include <linux/config.h> | |
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> | |
20 | ||
21 | #include <asm/div64.h> | |
22 | #include <asm/hardware.h> | |
23 | #include <asm/system.h> | |
24 | #include <asm/pgtable.h> | |
25 | #include <asm/mach/map.h> | |
26 | #include <asm/irq.h> | |
27 | ||
28 | #include "generic.h" | |
29 | ||
30 | #define NR_FREQS 16 | |
31 | ||
32 | /* | |
33 | * This table is setup for a 3.6864MHz Crystal. | |
34 | */ | |
35 | static const unsigned short cclk_frequency_100khz[NR_FREQS] = { | |
36 | 590, /* 59.0 MHz */ | |
37 | 737, /* 73.7 MHz */ | |
38 | 885, /* 88.5 MHz */ | |
39 | 1032, /* 103.2 MHz */ | |
40 | 1180, /* 118.0 MHz */ | |
41 | 1327, /* 132.7 MHz */ | |
42 | 1475, /* 147.5 MHz */ | |
43 | 1622, /* 162.2 MHz */ | |
44 | 1769, /* 176.9 MHz */ | |
45 | 1917, /* 191.7 MHz */ | |
46 | 2064, /* 206.4 MHz */ | |
47 | 2212, /* 221.2 MHz */ | |
48 | 2359, /* 235.9 MHz */ | |
49 | 2507, /* 250.7 MHz */ | |
50 | 2654, /* 265.4 MHz */ | |
51 | 2802 /* 280.2 MHz */ | |
52 | }; | |
53 | ||
54 | #if defined(CONFIG_CPU_FREQ_SA1100) || defined(CONFIG_CPU_FREQ_SA1110) | |
55 | /* rounds up(!) */ | |
56 | unsigned int sa11x0_freq_to_ppcr(unsigned int khz) | |
57 | { | |
58 | int i; | |
59 | ||
60 | khz /= 100; | |
61 | ||
62 | for (i = 0; i < NR_FREQS; i++) | |
63 | if (cclk_frequency_100khz[i] >= khz) | |
64 | break; | |
65 | ||
66 | return i; | |
67 | } | |
68 | ||
69 | unsigned int sa11x0_ppcr_to_freq(unsigned int idx) | |
70 | { | |
71 | unsigned int freq = 0; | |
72 | if (idx < NR_FREQS) | |
73 | freq = cclk_frequency_100khz[idx] * 100; | |
74 | return freq; | |
75 | } | |
76 | ||
77 | ||
78 | /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on | |
79 | * this platform, anyway. | |
80 | */ | |
81 | int sa11x0_verify_speed(struct cpufreq_policy *policy) | |
82 | { | |
83 | unsigned int tmp; | |
84 | if (policy->cpu) | |
85 | return -EINVAL; | |
86 | ||
87 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); | |
88 | ||
89 | /* make sure that at least one frequency is within the policy */ | |
90 | tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100; | |
91 | if (tmp > policy->max) | |
92 | policy->max = tmp; | |
93 | ||
94 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | unsigned int sa11x0_getspeed(unsigned int cpu) | |
100 | { | |
101 | if (cpu) | |
102 | return 0; | |
103 | return cclk_frequency_100khz[PPCR & 0xf] * 100; | |
104 | } | |
105 | ||
106 | #else | |
107 | /* | |
108 | * We still need to provide this so building without cpufreq works. | |
109 | */ | |
110 | unsigned int cpufreq_get(unsigned int cpu) | |
111 | { | |
112 | return cclk_frequency_100khz[PPCR & 0xf] * 100; | |
113 | } | |
114 | EXPORT_SYMBOL(cpufreq_get); | |
115 | #endif | |
116 | ||
117 | /* | |
118 | * This is the SA11x0 sched_clock implementation. This has | |
119 | * a resolution of 271ns, and a maximum value of 1165s. | |
120 | * ( * 1E9 / 3686400 => * 78125 / 288) | |
121 | */ | |
122 | unsigned long long sched_clock(void) | |
123 | { | |
124 | unsigned long long v; | |
125 | ||
126 | v = (unsigned long long)OSCR * 78125; | |
127 | do_div(v, 288); | |
128 | ||
129 | return v; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Default power-off for SA1100 | |
134 | */ | |
135 | static void sa1100_power_off(void) | |
136 | { | |
137 | mdelay(100); | |
138 | local_irq_disable(); | |
139 | /* disable internal oscillator, float CS lines */ | |
140 | PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS); | |
141 | /* enable wake-up on GPIO0 (Assabet...) */ | |
142 | PWER = GFER = GRER = 1; | |
143 | /* | |
144 | * set scratchpad to zero, just in case it is used as a | |
145 | * restart address by the bootloader. | |
146 | */ | |
147 | PSPR = 0; | |
148 | /* enter sleep mode */ | |
149 | PMCR = PMCR_SF; | |
150 | } | |
151 | ||
152 | static struct resource sa11x0udc_resources[] = { | |
153 | [0] = { | |
154 | .start = 0x80000000, | |
155 | .end = 0x8000ffff, | |
156 | .flags = IORESOURCE_MEM, | |
157 | }, | |
158 | }; | |
159 | ||
160 | static u64 sa11x0udc_dma_mask = 0xffffffffUL; | |
161 | ||
162 | static struct platform_device sa11x0udc_device = { | |
163 | .name = "sa11x0-udc", | |
164 | .id = -1, | |
165 | .dev = { | |
166 | .dma_mask = &sa11x0udc_dma_mask, | |
167 | .coherent_dma_mask = 0xffffffff, | |
168 | }, | |
169 | .num_resources = ARRAY_SIZE(sa11x0udc_resources), | |
170 | .resource = sa11x0udc_resources, | |
171 | }; | |
172 | ||
173 | static struct resource sa11x0uart1_resources[] = { | |
174 | [0] = { | |
175 | .start = 0x80010000, | |
176 | .end = 0x8001ffff, | |
177 | .flags = IORESOURCE_MEM, | |
178 | }, | |
179 | }; | |
180 | ||
181 | static struct platform_device sa11x0uart1_device = { | |
182 | .name = "sa11x0-uart", | |
183 | .id = 1, | |
184 | .num_resources = ARRAY_SIZE(sa11x0uart1_resources), | |
185 | .resource = sa11x0uart1_resources, | |
186 | }; | |
187 | ||
188 | static struct resource sa11x0uart3_resources[] = { | |
189 | [0] = { | |
190 | .start = 0x80050000, | |
191 | .end = 0x8005ffff, | |
192 | .flags = IORESOURCE_MEM, | |
193 | }, | |
194 | }; | |
195 | ||
196 | static struct platform_device sa11x0uart3_device = { | |
197 | .name = "sa11x0-uart", | |
198 | .id = 3, | |
199 | .num_resources = ARRAY_SIZE(sa11x0uart3_resources), | |
200 | .resource = sa11x0uart3_resources, | |
201 | }; | |
202 | ||
203 | static struct resource sa11x0mcp_resources[] = { | |
204 | [0] = { | |
205 | .start = 0x80060000, | |
206 | .end = 0x8006ffff, | |
207 | .flags = IORESOURCE_MEM, | |
208 | }, | |
209 | }; | |
210 | ||
211 | static u64 sa11x0mcp_dma_mask = 0xffffffffUL; | |
212 | ||
213 | static struct platform_device sa11x0mcp_device = { | |
214 | .name = "sa11x0-mcp", | |
215 | .id = -1, | |
216 | .dev = { | |
217 | .dma_mask = &sa11x0mcp_dma_mask, | |
218 | .coherent_dma_mask = 0xffffffff, | |
219 | }, | |
220 | .num_resources = ARRAY_SIZE(sa11x0mcp_resources), | |
221 | .resource = sa11x0mcp_resources, | |
222 | }; | |
223 | ||
323cdfc1 RK |
224 | void sa11x0_set_mcp_data(struct mcp_plat_data *data) |
225 | { | |
226 | sa11x0mcp_device.dev.platform_data = data; | |
227 | } | |
228 | ||
1da177e4 LT |
229 | static struct resource sa11x0ssp_resources[] = { |
230 | [0] = { | |
231 | .start = 0x80070000, | |
232 | .end = 0x8007ffff, | |
233 | .flags = IORESOURCE_MEM, | |
234 | }, | |
235 | }; | |
236 | ||
237 | static u64 sa11x0ssp_dma_mask = 0xffffffffUL; | |
238 | ||
239 | static struct platform_device sa11x0ssp_device = { | |
240 | .name = "sa11x0-ssp", | |
241 | .id = -1, | |
242 | .dev = { | |
243 | .dma_mask = &sa11x0ssp_dma_mask, | |
244 | .coherent_dma_mask = 0xffffffff, | |
245 | }, | |
246 | .num_resources = ARRAY_SIZE(sa11x0ssp_resources), | |
247 | .resource = sa11x0ssp_resources, | |
248 | }; | |
249 | ||
250 | static struct resource sa11x0fb_resources[] = { | |
251 | [0] = { | |
252 | .start = 0xb0100000, | |
253 | .end = 0xb010ffff, | |
254 | .flags = IORESOURCE_MEM, | |
255 | }, | |
256 | [1] = { | |
257 | .start = IRQ_LCD, | |
258 | .end = IRQ_LCD, | |
259 | .flags = IORESOURCE_IRQ, | |
260 | }, | |
261 | }; | |
262 | ||
263 | static struct platform_device sa11x0fb_device = { | |
264 | .name = "sa11x0-fb", | |
265 | .id = -1, | |
266 | .dev = { | |
267 | .coherent_dma_mask = 0xffffffff, | |
268 | }, | |
269 | .num_resources = ARRAY_SIZE(sa11x0fb_resources), | |
270 | .resource = sa11x0fb_resources, | |
271 | }; | |
272 | ||
273 | static struct platform_device sa11x0pcmcia_device = { | |
274 | .name = "sa11x0-pcmcia", | |
275 | .id = -1, | |
276 | }; | |
277 | ||
278 | static struct platform_device sa11x0mtd_device = { | |
279 | .name = "flash", | |
280 | .id = -1, | |
281 | }; | |
282 | ||
283 | void sa11x0_set_flash_data(struct flash_platform_data *flash, | |
284 | struct resource *res, int nr) | |
285 | { | |
286 | sa11x0mtd_device.dev.platform_data = flash; | |
287 | sa11x0mtd_device.resource = res; | |
288 | sa11x0mtd_device.num_resources = nr; | |
289 | } | |
290 | ||
291 | static struct resource sa11x0ir_resources[] = { | |
292 | { | |
293 | .start = __PREG(Ser2UTCR0), | |
294 | .end = __PREG(Ser2UTCR0) + 0x24 - 1, | |
295 | .flags = IORESOURCE_MEM, | |
296 | }, { | |
297 | .start = __PREG(Ser2HSCR0), | |
298 | .end = __PREG(Ser2HSCR0) + 0x1c - 1, | |
299 | .flags = IORESOURCE_MEM, | |
300 | }, { | |
301 | .start = __PREG(Ser2HSCR2), | |
302 | .end = __PREG(Ser2HSCR2) + 0x04 - 1, | |
303 | .flags = IORESOURCE_MEM, | |
304 | }, { | |
305 | .start = IRQ_Ser2ICP, | |
306 | .end = IRQ_Ser2ICP, | |
307 | .flags = IORESOURCE_IRQ, | |
308 | } | |
309 | }; | |
310 | ||
311 | static struct platform_device sa11x0ir_device = { | |
312 | .name = "sa11x0-ir", | |
313 | .id = -1, | |
314 | .num_resources = ARRAY_SIZE(sa11x0ir_resources), | |
315 | .resource = sa11x0ir_resources, | |
316 | }; | |
317 | ||
318 | void sa11x0_set_irda_data(struct irda_platform_data *irda) | |
319 | { | |
320 | sa11x0ir_device.dev.platform_data = irda; | |
321 | } | |
322 | ||
323 | static struct platform_device *sa11x0_devices[] __initdata = { | |
324 | &sa11x0udc_device, | |
325 | &sa11x0uart1_device, | |
326 | &sa11x0uart3_device, | |
327 | &sa11x0mcp_device, | |
328 | &sa11x0ssp_device, | |
329 | &sa11x0pcmcia_device, | |
330 | &sa11x0fb_device, | |
331 | &sa11x0mtd_device, | |
332 | }; | |
333 | ||
334 | static int __init sa1100_init(void) | |
335 | { | |
336 | pm_power_off = sa1100_power_off; | |
337 | ||
338 | if (sa11x0ir_device.dev.platform_data) | |
339 | platform_device_register(&sa11x0ir_device); | |
340 | ||
341 | return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices)); | |
342 | } | |
343 | ||
344 | arch_initcall(sa1100_init); | |
345 | ||
346 | void (*sa1100fb_backlight_power)(int on); | |
347 | void (*sa1100fb_lcd_power)(int on); | |
348 | ||
349 | EXPORT_SYMBOL(sa1100fb_backlight_power); | |
350 | EXPORT_SYMBOL(sa1100fb_lcd_power); | |
351 | ||
352 | ||
353 | /* | |
354 | * Common I/O mapping: | |
355 | * | |
356 | * Typically, static virtual address mappings are as follow: | |
357 | * | |
358 | * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.) | |
359 | * 0xf4000000-0xf4ffffff: SA-1111 | |
360 | * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area) | |
361 | * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above) | |
362 | * 0xffff0000-0xffff0fff: SA1100 exception vectors | |
363 | * 0xffff2000-0xffff2fff: Minicache copy_user_page area | |
364 | * | |
365 | * Below 0xe8000000 is reserved for vm allocation. | |
366 | * | |
367 | * The machine specific code must provide the extra mapping beside the | |
368 | * default mapping provided here. | |
369 | */ | |
370 | ||
371 | static struct map_desc standard_io_desc[] __initdata = { | |
372 | /* virtual physical length type */ | |
373 | { 0xf8000000, 0x80000000, 0x00100000, MT_DEVICE }, /* PCM */ | |
374 | { 0xfa000000, 0x90000000, 0x00100000, MT_DEVICE }, /* SCM */ | |
375 | { 0xfc000000, 0xa0000000, 0x00100000, MT_DEVICE }, /* MER */ | |
376 | { 0xfe000000, 0xb0000000, 0x00200000, MT_DEVICE } /* LCD + DMA */ | |
377 | }; | |
378 | ||
379 | void __init sa1100_map_io(void) | |
380 | { | |
381 | iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Disable the memory bus request/grant signals on the SA1110 to | |
386 | * ensure that we don't receive spurious memory requests. We set | |
387 | * the MBGNT signal false to ensure the SA1111 doesn't own the | |
388 | * SDRAM bus. | |
389 | */ | |
390 | void __init sa1110_mb_disable(void) | |
391 | { | |
392 | unsigned long flags; | |
393 | ||
394 | local_irq_save(flags); | |
395 | ||
396 | PGSR &= ~GPIO_MBGNT; | |
397 | GPCR = GPIO_MBGNT; | |
398 | GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; | |
399 | ||
400 | GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ); | |
401 | ||
402 | local_irq_restore(flags); | |
403 | } | |
404 | ||
405 | /* | |
406 | * If the system is going to use the SA-1111 DMA engines, set up | |
407 | * the memory bus request/grant pins. | |
408 | */ | |
409 | void __init sa1110_mb_enable(void) | |
410 | { | |
411 | unsigned long flags; | |
412 | ||
413 | local_irq_save(flags); | |
414 | ||
415 | PGSR &= ~GPIO_MBGNT; | |
416 | GPCR = GPIO_MBGNT; | |
417 | GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; | |
418 | ||
419 | GAFR |= (GPIO_MBGNT | GPIO_MBREQ); | |
420 | TUCR |= TUCR_MR; | |
421 | ||
422 | local_irq_restore(flags); | |
423 | } | |
424 |