2 * linux/arch/arm/mach-sa1100/generic.c
4 * Author: Nicolas Pitre
6 * Code common to all SA11x0 machines.
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.
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>
18 #include <linux/cpufreq.h>
19 #include <linux/ioport.h>
20 #include <linux/platform_device.h>
22 #include <asm/div64.h>
23 #include <asm/hardware.h>
24 #include <asm/system.h>
25 #include <asm/pgtable.h>
26 #include <asm/mach/map.h>
34 * This table is setup for a 3.6864MHz Crystal.
36 static const unsigned short cclk_frequency_100khz
[NR_FREQS
] = {
55 #if defined(CONFIG_CPU_FREQ_SA1100) || defined(CONFIG_CPU_FREQ_SA1110)
57 unsigned int sa11x0_freq_to_ppcr(unsigned int khz
)
63 for (i
= 0; i
< NR_FREQS
; i
++)
64 if (cclk_frequency_100khz
[i
] >= khz
)
70 unsigned int sa11x0_ppcr_to_freq(unsigned int idx
)
72 unsigned int freq
= 0;
74 freq
= cclk_frequency_100khz
[idx
] * 100;
79 /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
80 * this platform, anyway.
82 int sa11x0_verify_speed(struct cpufreq_policy
*policy
)
88 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
, policy
->cpuinfo
.max_freq
);
90 /* make sure that at least one frequency is within the policy */
91 tmp
= cclk_frequency_100khz
[sa11x0_freq_to_ppcr(policy
->min
)] * 100;
92 if (tmp
> policy
->max
)
95 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
, policy
->cpuinfo
.max_freq
);
100 unsigned int sa11x0_getspeed(unsigned int cpu
)
104 return cclk_frequency_100khz
[PPCR
& 0xf] * 100;
109 * We still need to provide this so building without cpufreq works.
111 unsigned int cpufreq_get(unsigned int cpu
)
113 return cclk_frequency_100khz
[PPCR
& 0xf] * 100;
115 EXPORT_SYMBOL(cpufreq_get
);
119 * This is the SA11x0 sched_clock implementation. This has
120 * a resolution of 271ns, and a maximum value of 1165s.
121 * ( * 1E9 / 3686400 => * 78125 / 288)
123 unsigned long long sched_clock(void)
125 unsigned long long v
;
127 v
= (unsigned long long)OSCR
* 78125;
134 * Default power-off for SA1100
136 static void sa1100_power_off(void)
140 /* disable internal oscillator, float CS lines */
141 PCFR
= (PCFR_OPDE
| PCFR_FP
| PCFR_FS
);
142 /* enable wake-up on GPIO0 (Assabet...) */
143 PWER
= GFER
= GRER
= 1;
145 * set scratchpad to zero, just in case it is used as a
146 * restart address by the bootloader.
149 /* enter sleep mode */
153 static struct resource sa11x0udc_resources
[] = {
157 .flags
= IORESOURCE_MEM
,
161 static u64 sa11x0udc_dma_mask
= 0xffffffffUL
;
163 static struct platform_device sa11x0udc_device
= {
164 .name
= "sa11x0-udc",
167 .dma_mask
= &sa11x0udc_dma_mask
,
168 .coherent_dma_mask
= 0xffffffff,
170 .num_resources
= ARRAY_SIZE(sa11x0udc_resources
),
171 .resource
= sa11x0udc_resources
,
174 static struct resource sa11x0uart1_resources
[] = {
178 .flags
= IORESOURCE_MEM
,
182 static struct platform_device sa11x0uart1_device
= {
183 .name
= "sa11x0-uart",
185 .num_resources
= ARRAY_SIZE(sa11x0uart1_resources
),
186 .resource
= sa11x0uart1_resources
,
189 static struct resource sa11x0uart3_resources
[] = {
193 .flags
= IORESOURCE_MEM
,
197 static struct platform_device sa11x0uart3_device
= {
198 .name
= "sa11x0-uart",
200 .num_resources
= ARRAY_SIZE(sa11x0uart3_resources
),
201 .resource
= sa11x0uart3_resources
,
204 static struct resource sa11x0mcp_resources
[] = {
208 .flags
= IORESOURCE_MEM
,
212 static u64 sa11x0mcp_dma_mask
= 0xffffffffUL
;
214 static struct platform_device sa11x0mcp_device
= {
215 .name
= "sa11x0-mcp",
218 .dma_mask
= &sa11x0mcp_dma_mask
,
219 .coherent_dma_mask
= 0xffffffff,
221 .num_resources
= ARRAY_SIZE(sa11x0mcp_resources
),
222 .resource
= sa11x0mcp_resources
,
225 void sa11x0_set_mcp_data(struct mcp_plat_data
*data
)
227 sa11x0mcp_device
.dev
.platform_data
= data
;
230 static struct resource sa11x0ssp_resources
[] = {
234 .flags
= IORESOURCE_MEM
,
238 static u64 sa11x0ssp_dma_mask
= 0xffffffffUL
;
240 static struct platform_device sa11x0ssp_device
= {
241 .name
= "sa11x0-ssp",
244 .dma_mask
= &sa11x0ssp_dma_mask
,
245 .coherent_dma_mask
= 0xffffffff,
247 .num_resources
= ARRAY_SIZE(sa11x0ssp_resources
),
248 .resource
= sa11x0ssp_resources
,
251 static struct resource sa11x0fb_resources
[] = {
255 .flags
= IORESOURCE_MEM
,
260 .flags
= IORESOURCE_IRQ
,
264 static struct platform_device sa11x0fb_device
= {
268 .coherent_dma_mask
= 0xffffffff,
270 .num_resources
= ARRAY_SIZE(sa11x0fb_resources
),
271 .resource
= sa11x0fb_resources
,
274 static struct platform_device sa11x0pcmcia_device
= {
275 .name
= "sa11x0-pcmcia",
279 static struct platform_device sa11x0mtd_device
= {
284 void sa11x0_set_flash_data(struct flash_platform_data
*flash
,
285 struct resource
*res
, int nr
)
287 sa11x0mtd_device
.dev
.platform_data
= flash
;
288 sa11x0mtd_device
.resource
= res
;
289 sa11x0mtd_device
.num_resources
= nr
;
292 static struct resource sa11x0ir_resources
[] = {
294 .start
= __PREG(Ser2UTCR0
),
295 .end
= __PREG(Ser2UTCR0
) + 0x24 - 1,
296 .flags
= IORESOURCE_MEM
,
298 .start
= __PREG(Ser2HSCR0
),
299 .end
= __PREG(Ser2HSCR0
) + 0x1c - 1,
300 .flags
= IORESOURCE_MEM
,
302 .start
= __PREG(Ser2HSCR2
),
303 .end
= __PREG(Ser2HSCR2
) + 0x04 - 1,
304 .flags
= IORESOURCE_MEM
,
306 .start
= IRQ_Ser2ICP
,
308 .flags
= IORESOURCE_IRQ
,
312 static struct platform_device sa11x0ir_device
= {
315 .num_resources
= ARRAY_SIZE(sa11x0ir_resources
),
316 .resource
= sa11x0ir_resources
,
319 void sa11x0_set_irda_data(struct irda_platform_data
*irda
)
321 sa11x0ir_device
.dev
.platform_data
= irda
;
324 static struct platform_device
*sa11x0_devices
[] __initdata
= {
330 &sa11x0pcmcia_device
,
335 static int __init
sa1100_init(void)
337 pm_power_off
= sa1100_power_off
;
339 if (sa11x0ir_device
.dev
.platform_data
)
340 platform_device_register(&sa11x0ir_device
);
342 return platform_add_devices(sa11x0_devices
, ARRAY_SIZE(sa11x0_devices
));
345 arch_initcall(sa1100_init
);
347 void (*sa1100fb_backlight_power
)(int on
);
348 void (*sa1100fb_lcd_power
)(int on
);
350 EXPORT_SYMBOL(sa1100fb_backlight_power
);
351 EXPORT_SYMBOL(sa1100fb_lcd_power
);
355 * Common I/O mapping:
357 * Typically, static virtual address mappings are as follow:
359 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
360 * 0xf4000000-0xf4ffffff: SA-1111
361 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
362 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
363 * 0xffff0000-0xffff0fff: SA1100 exception vectors
364 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
366 * Below 0xe8000000 is reserved for vm allocation.
368 * The machine specific code must provide the extra mapping beside the
369 * default mapping provided here.
372 static struct map_desc standard_io_desc
[] __initdata
= {
374 .virtual = 0xf8000000,
375 .pfn
= __phys_to_pfn(0x80000000),
376 .length
= 0x00100000,
379 .virtual = 0xfa000000,
380 .pfn
= __phys_to_pfn(0x90000000),
381 .length
= 0x00100000,
384 .virtual = 0xfc000000,
385 .pfn
= __phys_to_pfn(0xa0000000),
386 .length
= 0x00100000,
389 .virtual = 0xfe000000,
390 .pfn
= __phys_to_pfn(0xb0000000),
391 .length
= 0x00200000,
396 void __init
sa1100_map_io(void)
398 iotable_init(standard_io_desc
, ARRAY_SIZE(standard_io_desc
));
402 * Disable the memory bus request/grant signals on the SA1110 to
403 * ensure that we don't receive spurious memory requests. We set
404 * the MBGNT signal false to ensure the SA1111 doesn't own the
407 void __init
sa1110_mb_disable(void)
411 local_irq_save(flags
);
415 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
417 GAFR
&= ~(GPIO_MBGNT
| GPIO_MBREQ
);
419 local_irq_restore(flags
);
423 * If the system is going to use the SA-1111 DMA engines, set up
424 * the memory bus request/grant pins.
426 void __init
sa1110_mb_enable(void)
430 local_irq_save(flags
);
434 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
436 GAFR
|= (GPIO_MBGNT
| GPIO_MBREQ
);
439 local_irq_restore(flags
);