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/module.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
17 #include <linux/cpufreq.h>
18 #include <linux/ioport.h>
19 #include <linux/platform_device.h>
21 #include <asm/div64.h>
22 #include <mach/hardware.h>
23 #include <asm/system.h>
24 #include <asm/pgtable.h>
25 #include <asm/mach/map.h>
26 #include <asm/mach/flash.h>
32 unsigned int reset_status
;
33 EXPORT_SYMBOL(reset_status
);
38 * This table is setup for a 3.6864MHz Crystal.
40 static const unsigned short cclk_frequency_100khz
[NR_FREQS
] = {
60 unsigned int sa11x0_freq_to_ppcr(unsigned int khz
)
66 for (i
= 0; i
< NR_FREQS
; i
++)
67 if (cclk_frequency_100khz
[i
] >= khz
)
73 unsigned int sa11x0_ppcr_to_freq(unsigned int idx
)
75 unsigned int freq
= 0;
77 freq
= cclk_frequency_100khz
[idx
] * 100;
82 /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
83 * this platform, anyway.
85 int sa11x0_verify_speed(struct cpufreq_policy
*policy
)
91 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
, policy
->cpuinfo
.max_freq
);
93 /* make sure that at least one frequency is within the policy */
94 tmp
= cclk_frequency_100khz
[sa11x0_freq_to_ppcr(policy
->min
)] * 100;
95 if (tmp
> policy
->max
)
98 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
, policy
->cpuinfo
.max_freq
);
103 unsigned int sa11x0_getspeed(unsigned int cpu
)
107 return cclk_frequency_100khz
[PPCR
& 0xf] * 100;
111 * Default power-off for SA1100
113 static void sa1100_power_off(void)
117 /* disable internal oscillator, float CS lines */
118 PCFR
= (PCFR_OPDE
| PCFR_FP
| PCFR_FS
);
119 /* enable wake-up on GPIO0 (Assabet...) */
120 PWER
= GFER
= GRER
= 1;
122 * set scratchpad to zero, just in case it is used as a
123 * restart address by the bootloader.
126 /* enter sleep mode */
130 static void sa11x0_register_device(struct platform_device
*dev
, void *data
)
133 dev
->dev
.platform_data
= data
;
134 err
= platform_device_register(dev
);
136 printk(KERN_ERR
"Unable to register device %s: %d\n",
141 static struct resource sa11x0udc_resources
[] = {
143 .start
= __PREG(Ser0UDCCR
),
144 .end
= __PREG(Ser0UDCCR
) + 0xffff,
145 .flags
= IORESOURCE_MEM
,
148 .start
= IRQ_Ser0UDC
,
150 .flags
= IORESOURCE_IRQ
,
154 static u64 sa11x0udc_dma_mask
= 0xffffffffUL
;
156 static struct platform_device sa11x0udc_device
= {
157 .name
= "sa11x0-udc",
160 .dma_mask
= &sa11x0udc_dma_mask
,
161 .coherent_dma_mask
= 0xffffffff,
163 .num_resources
= ARRAY_SIZE(sa11x0udc_resources
),
164 .resource
= sa11x0udc_resources
,
167 static struct resource sa11x0uart1_resources
[] = {
169 .start
= __PREG(Ser1UTCR0
),
170 .end
= __PREG(Ser1UTCR0
) + 0xffff,
171 .flags
= IORESOURCE_MEM
,
174 .start
= IRQ_Ser1UART
,
176 .flags
= IORESOURCE_IRQ
,
180 static struct platform_device sa11x0uart1_device
= {
181 .name
= "sa11x0-uart",
183 .num_resources
= ARRAY_SIZE(sa11x0uart1_resources
),
184 .resource
= sa11x0uart1_resources
,
187 static struct resource sa11x0uart3_resources
[] = {
189 .start
= __PREG(Ser3UTCR0
),
190 .end
= __PREG(Ser3UTCR0
) + 0xffff,
191 .flags
= IORESOURCE_MEM
,
194 .start
= IRQ_Ser3UART
,
196 .flags
= IORESOURCE_IRQ
,
200 static struct platform_device sa11x0uart3_device
= {
201 .name
= "sa11x0-uart",
203 .num_resources
= ARRAY_SIZE(sa11x0uart3_resources
),
204 .resource
= sa11x0uart3_resources
,
207 static struct resource sa11x0mcp_resources
[] = {
209 .start
= __PREG(Ser4MCCR0
),
210 .end
= __PREG(Ser4MCCR0
) + 0xffff,
211 .flags
= IORESOURCE_MEM
,
214 .start
= IRQ_Ser4MCP
,
216 .flags
= IORESOURCE_IRQ
,
220 static u64 sa11x0mcp_dma_mask
= 0xffffffffUL
;
222 static struct platform_device sa11x0mcp_device
= {
223 .name
= "sa11x0-mcp",
226 .dma_mask
= &sa11x0mcp_dma_mask
,
227 .coherent_dma_mask
= 0xffffffff,
229 .num_resources
= ARRAY_SIZE(sa11x0mcp_resources
),
230 .resource
= sa11x0mcp_resources
,
233 void sa11x0_register_mcp(struct mcp_plat_data
*data
)
235 sa11x0_register_device(&sa11x0mcp_device
, data
);
238 static struct resource sa11x0ssp_resources
[] = {
242 .flags
= IORESOURCE_MEM
,
245 .start
= IRQ_Ser4SSP
,
247 .flags
= IORESOURCE_IRQ
,
251 static u64 sa11x0ssp_dma_mask
= 0xffffffffUL
;
253 static struct platform_device sa11x0ssp_device
= {
254 .name
= "sa11x0-ssp",
257 .dma_mask
= &sa11x0ssp_dma_mask
,
258 .coherent_dma_mask
= 0xffffffff,
260 .num_resources
= ARRAY_SIZE(sa11x0ssp_resources
),
261 .resource
= sa11x0ssp_resources
,
264 static struct resource sa11x0fb_resources
[] = {
268 .flags
= IORESOURCE_MEM
,
273 .flags
= IORESOURCE_IRQ
,
277 static struct platform_device sa11x0fb_device
= {
281 .coherent_dma_mask
= 0xffffffff,
283 .num_resources
= ARRAY_SIZE(sa11x0fb_resources
),
284 .resource
= sa11x0fb_resources
,
287 static struct platform_device sa11x0pcmcia_device
= {
288 .name
= "sa11x0-pcmcia",
292 static struct platform_device sa11x0mtd_device
= {
293 .name
= "sa1100-mtd",
297 void sa11x0_register_mtd(struct flash_platform_data
*flash
,
298 struct resource
*res
, int nr
)
300 flash
->name
= "sa1100";
301 sa11x0mtd_device
.resource
= res
;
302 sa11x0mtd_device
.num_resources
= nr
;
303 sa11x0_register_device(&sa11x0mtd_device
, flash
);
306 static struct resource sa11x0ir_resources
[] = {
308 .start
= __PREG(Ser2UTCR0
),
309 .end
= __PREG(Ser2UTCR0
) + 0x24 - 1,
310 .flags
= IORESOURCE_MEM
,
312 .start
= __PREG(Ser2HSCR0
),
313 .end
= __PREG(Ser2HSCR0
) + 0x1c - 1,
314 .flags
= IORESOURCE_MEM
,
316 .start
= __PREG(Ser2HSCR2
),
317 .end
= __PREG(Ser2HSCR2
) + 0x04 - 1,
318 .flags
= IORESOURCE_MEM
,
320 .start
= IRQ_Ser2ICP
,
322 .flags
= IORESOURCE_IRQ
,
326 static struct platform_device sa11x0ir_device
= {
329 .num_resources
= ARRAY_SIZE(sa11x0ir_resources
),
330 .resource
= sa11x0ir_resources
,
333 void sa11x0_register_irda(struct irda_platform_data
*irda
)
335 sa11x0_register_device(&sa11x0ir_device
, irda
);
338 static struct platform_device sa11x0rtc_device
= {
339 .name
= "sa1100-rtc",
343 static struct platform_device
*sa11x0_devices
[] __initdata
= {
348 &sa11x0pcmcia_device
,
353 static int __init
sa1100_init(void)
355 pm_power_off
= sa1100_power_off
;
356 return platform_add_devices(sa11x0_devices
, ARRAY_SIZE(sa11x0_devices
));
359 arch_initcall(sa1100_init
);
361 void (*sa1100fb_backlight_power
)(int on
);
362 void (*sa1100fb_lcd_power
)(int on
);
364 EXPORT_SYMBOL(sa1100fb_backlight_power
);
365 EXPORT_SYMBOL(sa1100fb_lcd_power
);
369 * Common I/O mapping:
371 * Typically, static virtual address mappings are as follow:
373 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
374 * 0xf4000000-0xf4ffffff: SA-1111
375 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
376 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
377 * 0xffff0000-0xffff0fff: SA1100 exception vectors
378 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
380 * Below 0xe8000000 is reserved for vm allocation.
382 * The machine specific code must provide the extra mapping beside the
383 * default mapping provided here.
386 static struct map_desc standard_io_desc
[] __initdata
= {
388 .virtual = 0xf8000000,
389 .pfn
= __phys_to_pfn(0x80000000),
390 .length
= 0x00100000,
393 .virtual = 0xfa000000,
394 .pfn
= __phys_to_pfn(0x90000000),
395 .length
= 0x00100000,
398 .virtual = 0xfc000000,
399 .pfn
= __phys_to_pfn(0xa0000000),
400 .length
= 0x00100000,
403 .virtual = 0xfe000000,
404 .pfn
= __phys_to_pfn(0xb0000000),
405 .length
= 0x00200000,
410 void __init
sa1100_map_io(void)
412 iotable_init(standard_io_desc
, ARRAY_SIZE(standard_io_desc
));
416 * Disable the memory bus request/grant signals on the SA1110 to
417 * ensure that we don't receive spurious memory requests. We set
418 * the MBGNT signal false to ensure the SA1111 doesn't own the
421 void __init
sa1110_mb_disable(void)
425 local_irq_save(flags
);
429 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
431 GAFR
&= ~(GPIO_MBGNT
| GPIO_MBREQ
);
433 local_irq_restore(flags
);
437 * If the system is going to use the SA-1111 DMA engines, set up
438 * the memory bus request/grant pins.
440 void __devinit
sa1110_mb_enable(void)
444 local_irq_save(flags
);
448 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
450 GAFR
|= (GPIO_MBGNT
| GPIO_MBREQ
);
453 local_irq_restore(flags
);