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/mach/map.h>
25 #include <asm/mach/flash.h>
31 unsigned int reset_status
;
32 EXPORT_SYMBOL(reset_status
);
37 * This table is setup for a 3.6864MHz Crystal.
39 static const unsigned short cclk_frequency_100khz
[NR_FREQS
] = {
59 unsigned int sa11x0_freq_to_ppcr(unsigned int khz
)
65 for (i
= 0; i
< NR_FREQS
; i
++)
66 if (cclk_frequency_100khz
[i
] >= khz
)
72 unsigned int sa11x0_ppcr_to_freq(unsigned int idx
)
74 unsigned int freq
= 0;
76 freq
= cclk_frequency_100khz
[idx
] * 100;
81 /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on
82 * this platform, anyway.
84 int sa11x0_verify_speed(struct cpufreq_policy
*policy
)
90 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
, policy
->cpuinfo
.max_freq
);
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
)
97 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
, policy
->cpuinfo
.max_freq
);
102 unsigned int sa11x0_getspeed(unsigned int cpu
)
106 return cclk_frequency_100khz
[PPCR
& 0xf] * 100;
110 * Default power-off for SA1100
112 static void sa1100_power_off(void)
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;
121 * set scratchpad to zero, just in case it is used as a
122 * restart address by the bootloader.
125 /* enter sleep mode */
129 static void sa11x0_register_device(struct platform_device
*dev
, void *data
)
132 dev
->dev
.platform_data
= data
;
133 err
= platform_device_register(dev
);
135 printk(KERN_ERR
"Unable to register device %s: %d\n",
140 static struct resource sa11x0udc_resources
[] = {
142 .start
= __PREG(Ser0UDCCR
),
143 .end
= __PREG(Ser0UDCCR
) + 0xffff,
144 .flags
= IORESOURCE_MEM
,
147 .start
= IRQ_Ser0UDC
,
149 .flags
= IORESOURCE_IRQ
,
153 static u64 sa11x0udc_dma_mask
= 0xffffffffUL
;
155 static struct platform_device sa11x0udc_device
= {
156 .name
= "sa11x0-udc",
159 .dma_mask
= &sa11x0udc_dma_mask
,
160 .coherent_dma_mask
= 0xffffffff,
162 .num_resources
= ARRAY_SIZE(sa11x0udc_resources
),
163 .resource
= sa11x0udc_resources
,
166 static struct resource sa11x0uart1_resources
[] = {
168 .start
= __PREG(Ser1UTCR0
),
169 .end
= __PREG(Ser1UTCR0
) + 0xffff,
170 .flags
= IORESOURCE_MEM
,
173 .start
= IRQ_Ser1UART
,
175 .flags
= IORESOURCE_IRQ
,
179 static struct platform_device sa11x0uart1_device
= {
180 .name
= "sa11x0-uart",
182 .num_resources
= ARRAY_SIZE(sa11x0uart1_resources
),
183 .resource
= sa11x0uart1_resources
,
186 static struct resource sa11x0uart3_resources
[] = {
188 .start
= __PREG(Ser3UTCR0
),
189 .end
= __PREG(Ser3UTCR0
) + 0xffff,
190 .flags
= IORESOURCE_MEM
,
193 .start
= IRQ_Ser3UART
,
195 .flags
= IORESOURCE_IRQ
,
199 static struct platform_device sa11x0uart3_device
= {
200 .name
= "sa11x0-uart",
202 .num_resources
= ARRAY_SIZE(sa11x0uart3_resources
),
203 .resource
= sa11x0uart3_resources
,
206 static struct resource sa11x0mcp_resources
[] = {
208 .start
= __PREG(Ser4MCCR0
),
209 .end
= __PREG(Ser4MCCR0
) + 0xffff,
210 .flags
= IORESOURCE_MEM
,
213 .start
= IRQ_Ser4MCP
,
215 .flags
= IORESOURCE_IRQ
,
219 static u64 sa11x0mcp_dma_mask
= 0xffffffffUL
;
221 static struct platform_device sa11x0mcp_device
= {
222 .name
= "sa11x0-mcp",
225 .dma_mask
= &sa11x0mcp_dma_mask
,
226 .coherent_dma_mask
= 0xffffffff,
228 .num_resources
= ARRAY_SIZE(sa11x0mcp_resources
),
229 .resource
= sa11x0mcp_resources
,
232 void sa11x0_register_mcp(struct mcp_plat_data
*data
)
234 sa11x0_register_device(&sa11x0mcp_device
, data
);
237 static struct resource sa11x0ssp_resources
[] = {
241 .flags
= IORESOURCE_MEM
,
244 .start
= IRQ_Ser4SSP
,
246 .flags
= IORESOURCE_IRQ
,
250 static u64 sa11x0ssp_dma_mask
= 0xffffffffUL
;
252 static struct platform_device sa11x0ssp_device
= {
253 .name
= "sa11x0-ssp",
256 .dma_mask
= &sa11x0ssp_dma_mask
,
257 .coherent_dma_mask
= 0xffffffff,
259 .num_resources
= ARRAY_SIZE(sa11x0ssp_resources
),
260 .resource
= sa11x0ssp_resources
,
263 static struct resource sa11x0fb_resources
[] = {
267 .flags
= IORESOURCE_MEM
,
272 .flags
= IORESOURCE_IRQ
,
276 static struct platform_device sa11x0fb_device
= {
280 .coherent_dma_mask
= 0xffffffff,
282 .num_resources
= ARRAY_SIZE(sa11x0fb_resources
),
283 .resource
= sa11x0fb_resources
,
286 static struct platform_device sa11x0pcmcia_device
= {
287 .name
= "sa11x0-pcmcia",
291 static struct platform_device sa11x0mtd_device
= {
292 .name
= "sa1100-mtd",
296 void sa11x0_register_mtd(struct flash_platform_data
*flash
,
297 struct resource
*res
, int nr
)
299 flash
->name
= "sa1100";
300 sa11x0mtd_device
.resource
= res
;
301 sa11x0mtd_device
.num_resources
= nr
;
302 sa11x0_register_device(&sa11x0mtd_device
, flash
);
305 static struct resource sa11x0ir_resources
[] = {
307 .start
= __PREG(Ser2UTCR0
),
308 .end
= __PREG(Ser2UTCR0
) + 0x24 - 1,
309 .flags
= IORESOURCE_MEM
,
311 .start
= __PREG(Ser2HSCR0
),
312 .end
= __PREG(Ser2HSCR0
) + 0x1c - 1,
313 .flags
= IORESOURCE_MEM
,
315 .start
= __PREG(Ser2HSCR2
),
316 .end
= __PREG(Ser2HSCR2
) + 0x04 - 1,
317 .flags
= IORESOURCE_MEM
,
319 .start
= IRQ_Ser2ICP
,
321 .flags
= IORESOURCE_IRQ
,
325 static struct platform_device sa11x0ir_device
= {
328 .num_resources
= ARRAY_SIZE(sa11x0ir_resources
),
329 .resource
= sa11x0ir_resources
,
332 void sa11x0_register_irda(struct irda_platform_data
*irda
)
334 sa11x0_register_device(&sa11x0ir_device
, irda
);
337 static struct platform_device sa11x0rtc_device
= {
338 .name
= "sa1100-rtc",
342 static struct platform_device
*sa11x0_devices
[] __initdata
= {
347 &sa11x0pcmcia_device
,
352 static int __init
sa1100_init(void)
354 pm_power_off
= sa1100_power_off
;
355 return platform_add_devices(sa11x0_devices
, ARRAY_SIZE(sa11x0_devices
));
358 arch_initcall(sa1100_init
);
360 void (*sa1100fb_backlight_power
)(int on
);
361 void (*sa1100fb_lcd_power
)(int on
);
363 EXPORT_SYMBOL(sa1100fb_backlight_power
);
364 EXPORT_SYMBOL(sa1100fb_lcd_power
);
368 * Common I/O mapping:
370 * Typically, static virtual address mappings are as follow:
372 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
373 * 0xf4000000-0xf4ffffff: SA-1111
374 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
375 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
376 * 0xffff0000-0xffff0fff: SA1100 exception vectors
377 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
379 * Below 0xe8000000 is reserved for vm allocation.
381 * The machine specific code must provide the extra mapping beside the
382 * default mapping provided here.
385 static struct map_desc standard_io_desc
[] __initdata
= {
387 .virtual = 0xf8000000,
388 .pfn
= __phys_to_pfn(0x80000000),
389 .length
= 0x00100000,
392 .virtual = 0xfa000000,
393 .pfn
= __phys_to_pfn(0x90000000),
394 .length
= 0x00100000,
397 .virtual = 0xfc000000,
398 .pfn
= __phys_to_pfn(0xa0000000),
399 .length
= 0x00100000,
402 .virtual = 0xfe000000,
403 .pfn
= __phys_to_pfn(0xb0000000),
404 .length
= 0x00200000,
409 void __init
sa1100_map_io(void)
411 iotable_init(standard_io_desc
, ARRAY_SIZE(standard_io_desc
));
415 * Disable the memory bus request/grant signals on the SA1110 to
416 * ensure that we don't receive spurious memory requests. We set
417 * the MBGNT signal false to ensure the SA1111 doesn't own the
420 void __init
sa1110_mb_disable(void)
424 local_irq_save(flags
);
428 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
430 GAFR
&= ~(GPIO_MBGNT
| GPIO_MBREQ
);
432 local_irq_restore(flags
);
436 * If the system is going to use the SA-1111 DMA engines, set up
437 * the memory bus request/grant pins.
439 void __devinit
sa1110_mb_enable(void)
443 local_irq_save(flags
);
447 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
449 GAFR
|= (GPIO_MBGNT
| GPIO_MBREQ
);
452 local_irq_restore(flags
);