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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
Russell King2f8163b2011-07-26 10:53:52 +010012#include <linux/gpio.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#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>
Russell Kingd052d1b2005-10-29 19:07:23 +010020#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
22#include <asm/div64.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010023#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <asm/system.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <asm/mach/map.h>
Russell King14e66f72005-10-29 16:08:31 +010026#include <asm/mach/flash.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <asm/irq.h>
28
29#include "generic.h"
30
Eric Miao04fef222008-07-29 14:26:00 +080031unsigned int reset_status;
32EXPORT_SYMBOL(reset_status);
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#define NR_FREQS 16
35
36/*
37 * This table is setup for a 3.6864MHz Crystal.
38 */
39static const unsigned short cclk_frequency_100khz[NR_FREQS] = {
40 590, /* 59.0 MHz */
41 737, /* 73.7 MHz */
Kristoffer Ericsonbda03082008-09-29 17:09:10 +010042 885, /* 88.5 MHz */
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 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 */
Kristoffer Ericsonbda03082008-09-29 17:09:10 +010052 2359, /* 235.9 MHz */
53 2507, /* 250.7 MHz */
54 2654, /* 265.4 MHz */
55 2802 /* 280.2 MHz */
Linus Torvalds1da177e2005-04-16 15:20:36 -070056};
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058/* rounds up(!) */
59unsigned 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
72unsigned 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 */
84int 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
102unsigned int sa11x0_getspeed(unsigned int cpu)
103{
104 if (cpu)
105 return 0;
106 return cclk_frequency_100khz[PPCR & 0xf] * 100;
107}
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 * Default power-off for SA1100
111 */
112static 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
Russell Kingd9ca5832011-11-05 10:28:50 +0000129void sa11x0_restart(char mode, const char *cmd)
130{
131 if (mode == 's') {
132 /* Jump into ROM at address 0 */
133 soft_restart(0);
134 } else {
135 /* Use on-chip reset capability */
136 RSRR = RSRR_SWR;
137 }
138}
139
Russell King7a5b4e12009-10-06 14:55:53 +0100140static void sa11x0_register_device(struct platform_device *dev, void *data)
141{
142 int err;
143 dev->dev.platform_data = data;
144 err = platform_device_register(dev);
145 if (err)
146 printk(KERN_ERR "Unable to register device %s: %d\n",
147 dev->name, err);
148}
149
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151static struct resource sa11x0udc_resources[] = {
152 [0] = {
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100153 .start = __PREG(Ser0UDCCR),
154 .end = __PREG(Ser0UDCCR) + 0xffff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 .flags = IORESOURCE_MEM,
156 },
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100157 [1] = {
158 .start = IRQ_Ser0UDC,
159 .end = IRQ_Ser0UDC,
160 .flags = IORESOURCE_IRQ,
161 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162};
163
164static u64 sa11x0udc_dma_mask = 0xffffffffUL;
165
166static struct platform_device sa11x0udc_device = {
167 .name = "sa11x0-udc",
168 .id = -1,
169 .dev = {
170 .dma_mask = &sa11x0udc_dma_mask,
171 .coherent_dma_mask = 0xffffffff,
172 },
173 .num_resources = ARRAY_SIZE(sa11x0udc_resources),
174 .resource = sa11x0udc_resources,
175};
176
177static struct resource sa11x0uart1_resources[] = {
178 [0] = {
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100179 .start = __PREG(Ser1UTCR0),
180 .end = __PREG(Ser1UTCR0) + 0xffff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 .flags = IORESOURCE_MEM,
182 },
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100183 [1] = {
184 .start = IRQ_Ser1UART,
185 .end = IRQ_Ser1UART,
186 .flags = IORESOURCE_IRQ,
187 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188};
189
190static struct platform_device sa11x0uart1_device = {
191 .name = "sa11x0-uart",
192 .id = 1,
193 .num_resources = ARRAY_SIZE(sa11x0uart1_resources),
194 .resource = sa11x0uart1_resources,
195};
196
197static struct resource sa11x0uart3_resources[] = {
198 [0] = {
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100199 .start = __PREG(Ser3UTCR0),
200 .end = __PREG(Ser3UTCR0) + 0xffff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 .flags = IORESOURCE_MEM,
202 },
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100203 [1] = {
204 .start = IRQ_Ser3UART,
205 .end = IRQ_Ser3UART,
206 .flags = IORESOURCE_IRQ,
207 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208};
209
210static struct platform_device sa11x0uart3_device = {
211 .name = "sa11x0-uart",
212 .id = 3,
213 .num_resources = ARRAY_SIZE(sa11x0uart3_resources),
214 .resource = sa11x0uart3_resources,
215};
216
217static struct resource sa11x0mcp_resources[] = {
218 [0] = {
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100219 .start = __PREG(Ser4MCCR0),
Russell King216f63c2012-01-20 17:37:21 +0000220 .end = __PREG(Ser4MCCR0) + 0xffff,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 .flags = IORESOURCE_MEM,
222 },
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100223 [1] = {
224 .start = IRQ_Ser4MCP,
225 .end = IRQ_Ser4MCP,
226 .flags = IORESOURCE_IRQ,
227 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228};
229
230static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
231
232static struct platform_device sa11x0mcp_device = {
233 .name = "sa11x0-mcp",
234 .id = -1,
235 .dev = {
236 .dma_mask = &sa11x0mcp_dma_mask,
237 .coherent_dma_mask = 0xffffffff,
238 },
239 .num_resources = ARRAY_SIZE(sa11x0mcp_resources),
240 .resource = sa11x0mcp_resources,
241};
242
Russell King7a5b4e12009-10-06 14:55:53 +0100243void sa11x0_register_mcp(struct mcp_plat_data *data)
Russell King323cdfc2005-08-18 10:10:46 +0100244{
Russell King7a5b4e12009-10-06 14:55:53 +0100245 sa11x0_register_device(&sa11x0mcp_device, data);
Russell King323cdfc2005-08-18 10:10:46 +0100246}
247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248static struct resource sa11x0ssp_resources[] = {
249 [0] = {
250 .start = 0x80070000,
251 .end = 0x8007ffff,
252 .flags = IORESOURCE_MEM,
253 },
Jochen Friedrichcf562b42011-01-03 12:19:00 +0100254 [1] = {
255 .start = IRQ_Ser4SSP,
256 .end = IRQ_Ser4SSP,
257 .flags = IORESOURCE_IRQ,
258 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259};
260
261static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
262
263static struct platform_device sa11x0ssp_device = {
264 .name = "sa11x0-ssp",
265 .id = -1,
266 .dev = {
267 .dma_mask = &sa11x0ssp_dma_mask,
268 .coherent_dma_mask = 0xffffffff,
269 },
270 .num_resources = ARRAY_SIZE(sa11x0ssp_resources),
271 .resource = sa11x0ssp_resources,
272};
273
274static struct resource sa11x0fb_resources[] = {
275 [0] = {
276 .start = 0xb0100000,
277 .end = 0xb010ffff,
278 .flags = IORESOURCE_MEM,
279 },
280 [1] = {
281 .start = IRQ_LCD,
282 .end = IRQ_LCD,
283 .flags = IORESOURCE_IRQ,
284 },
285};
286
287static struct platform_device sa11x0fb_device = {
288 .name = "sa11x0-fb",
289 .id = -1,
290 .dev = {
291 .coherent_dma_mask = 0xffffffff,
292 },
293 .num_resources = ARRAY_SIZE(sa11x0fb_resources),
294 .resource = sa11x0fb_resources,
295};
296
297static struct platform_device sa11x0pcmcia_device = {
298 .name = "sa11x0-pcmcia",
299 .id = -1,
300};
301
302static struct platform_device sa11x0mtd_device = {
Uwe Kleine-Königbcc8f3e2009-01-31 01:21:58 +0100303 .name = "sa1100-mtd",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 .id = -1,
305};
306
Russell King7a5b4e12009-10-06 14:55:53 +0100307void sa11x0_register_mtd(struct flash_platform_data *flash,
308 struct resource *res, int nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
Russell King14e66f72005-10-29 16:08:31 +0100310 flash->name = "sa1100";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 sa11x0mtd_device.resource = res;
312 sa11x0mtd_device.num_resources = nr;
Russell King7a5b4e12009-10-06 14:55:53 +0100313 sa11x0_register_device(&sa11x0mtd_device, flash);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314}
315
316static struct resource sa11x0ir_resources[] = {
317 {
318 .start = __PREG(Ser2UTCR0),
319 .end = __PREG(Ser2UTCR0) + 0x24 - 1,
320 .flags = IORESOURCE_MEM,
321 }, {
322 .start = __PREG(Ser2HSCR0),
323 .end = __PREG(Ser2HSCR0) + 0x1c - 1,
324 .flags = IORESOURCE_MEM,
325 }, {
326 .start = __PREG(Ser2HSCR2),
327 .end = __PREG(Ser2HSCR2) + 0x04 - 1,
328 .flags = IORESOURCE_MEM,
329 }, {
330 .start = IRQ_Ser2ICP,
331 .end = IRQ_Ser2ICP,
332 .flags = IORESOURCE_IRQ,
333 }
334};
335
336static struct platform_device sa11x0ir_device = {
337 .name = "sa11x0-ir",
338 .id = -1,
339 .num_resources = ARRAY_SIZE(sa11x0ir_resources),
340 .resource = sa11x0ir_resources,
341};
342
Russell King7a5b4e12009-10-06 14:55:53 +0100343void sa11x0_register_irda(struct irda_platform_data *irda)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Russell King7a5b4e12009-10-06 14:55:53 +0100345 sa11x0_register_device(&sa11x0ir_device, irda);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
Richard Purdiee842f1c2006-03-27 01:16:46 -0800348static struct platform_device sa11x0rtc_device = {
349 .name = "sa1100-rtc",
350 .id = -1,
351};
352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353static struct platform_device *sa11x0_devices[] __initdata = {
354 &sa11x0udc_device,
355 &sa11x0uart1_device,
356 &sa11x0uart3_device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 &sa11x0ssp_device,
358 &sa11x0pcmcia_device,
359 &sa11x0fb_device,
Richard Purdiee842f1c2006-03-27 01:16:46 -0800360 &sa11x0rtc_device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361};
362
363static int __init sa1100_init(void)
364{
365 pm_power_off = sa1100_power_off;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
367}
368
369arch_initcall(sa1100_init);
370
371void (*sa1100fb_backlight_power)(int on);
372void (*sa1100fb_lcd_power)(int on);
373
374EXPORT_SYMBOL(sa1100fb_backlight_power);
375EXPORT_SYMBOL(sa1100fb_lcd_power);
376
377
378/*
379 * Common I/O mapping:
380 *
381 * Typically, static virtual address mappings are as follow:
382 *
383 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
384 * 0xf4000000-0xf4ffffff: SA-1111
385 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
386 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
387 * 0xffff0000-0xffff0fff: SA1100 exception vectors
388 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
389 *
390 * Below 0xe8000000 is reserved for vm allocation.
391 *
392 * The machine specific code must provide the extra mapping beside the
393 * default mapping provided here.
394 */
395
396static struct map_desc standard_io_desc[] __initdata = {
Kristoffer Ericsonbda03082008-09-29 17:09:10 +0100397 { /* PCM */
Deepak Saxena92519d82005-10-28 15:19:04 +0100398 .virtual = 0xf8000000,
399 .pfn = __phys_to_pfn(0x80000000),
400 .length = 0x00100000,
401 .type = MT_DEVICE
402 }, { /* SCM */
403 .virtual = 0xfa000000,
404 .pfn = __phys_to_pfn(0x90000000),
405 .length = 0x00100000,
406 .type = MT_DEVICE
407 }, { /* MER */
408 .virtual = 0xfc000000,
409 .pfn = __phys_to_pfn(0xa0000000),
410 .length = 0x00100000,
411 .type = MT_DEVICE
412 }, { /* LCD + DMA */
413 .virtual = 0xfe000000,
414 .pfn = __phys_to_pfn(0xb0000000),
415 .length = 0x00200000,
416 .type = MT_DEVICE
417 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418};
419
420void __init sa1100_map_io(void)
421{
422 iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
423}
424
425/*
426 * Disable the memory bus request/grant signals on the SA1110 to
427 * ensure that we don't receive spurious memory requests. We set
428 * the MBGNT signal false to ensure the SA1111 doesn't own the
429 * SDRAM bus.
430 */
431void __init sa1110_mb_disable(void)
432{
433 unsigned long flags;
434
435 local_irq_save(flags);
436
437 PGSR &= ~GPIO_MBGNT;
438 GPCR = GPIO_MBGNT;
439 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
440
441 GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
442
443 local_irq_restore(flags);
444}
445
446/*
447 * If the system is going to use the SA-1111 DMA engines, set up
448 * the memory bus request/grant pins.
449 */
Kristoffer Ericson85e6c7a2008-02-03 22:08:10 +0100450void __devinit sa1110_mb_enable(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
452 unsigned long flags;
453
454 local_irq_save(flags);
455
456 PGSR &= ~GPIO_MBGNT;
457 GPCR = GPIO_MBGNT;
458 GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
459
460 GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
461 TUCR |= TUCR_MR;
462
463 local_irq_restore(flags);
464}
465