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/gpio.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 <mach/hardware.h>
24 #include <asm/system.h>
25 #include <asm/mach/map.h>
26 #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 void sa11x0_restart(char mode
, const char *cmd
)
132 /* Jump into ROM at address 0 */
135 /* Use on-chip reset capability */
140 static void sa11x0_register_device(struct platform_device
*dev
, void *data
)
143 dev
->dev
.platform_data
= data
;
144 err
= platform_device_register(dev
);
146 printk(KERN_ERR
"Unable to register device %s: %d\n",
151 static struct resource sa11x0udc_resources
[] = {
153 .start
= __PREG(Ser0UDCCR
),
154 .end
= __PREG(Ser0UDCCR
) + 0xffff,
155 .flags
= IORESOURCE_MEM
,
158 .start
= IRQ_Ser0UDC
,
160 .flags
= IORESOURCE_IRQ
,
164 static u64 sa11x0udc_dma_mask
= 0xffffffffUL
;
166 static struct platform_device sa11x0udc_device
= {
167 .name
= "sa11x0-udc",
170 .dma_mask
= &sa11x0udc_dma_mask
,
171 .coherent_dma_mask
= 0xffffffff,
173 .num_resources
= ARRAY_SIZE(sa11x0udc_resources
),
174 .resource
= sa11x0udc_resources
,
177 static struct resource sa11x0uart1_resources
[] = {
179 .start
= __PREG(Ser1UTCR0
),
180 .end
= __PREG(Ser1UTCR0
) + 0xffff,
181 .flags
= IORESOURCE_MEM
,
184 .start
= IRQ_Ser1UART
,
186 .flags
= IORESOURCE_IRQ
,
190 static struct platform_device sa11x0uart1_device
= {
191 .name
= "sa11x0-uart",
193 .num_resources
= ARRAY_SIZE(sa11x0uart1_resources
),
194 .resource
= sa11x0uart1_resources
,
197 static struct resource sa11x0uart3_resources
[] = {
199 .start
= __PREG(Ser3UTCR0
),
200 .end
= __PREG(Ser3UTCR0
) + 0xffff,
201 .flags
= IORESOURCE_MEM
,
204 .start
= IRQ_Ser3UART
,
206 .flags
= IORESOURCE_IRQ
,
210 static struct platform_device sa11x0uart3_device
= {
211 .name
= "sa11x0-uart",
213 .num_resources
= ARRAY_SIZE(sa11x0uart3_resources
),
214 .resource
= sa11x0uart3_resources
,
217 static struct resource sa11x0mcp_resources
[] = {
219 .start
= __PREG(Ser4MCCR0
),
220 .end
= __PREG(Ser4MCCR0
) + 0x1C - 1,
221 .flags
= IORESOURCE_MEM
,
224 .start
= __PREG(Ser4MCCR1
),
225 .end
= __PREG(Ser4MCCR1
) + 0x4 - 1,
226 .flags
= IORESOURCE_MEM
,
229 .start
= IRQ_Ser4MCP
,
231 .flags
= IORESOURCE_IRQ
,
235 static u64 sa11x0mcp_dma_mask
= 0xffffffffUL
;
237 static struct platform_device sa11x0mcp_device
= {
238 .name
= "sa11x0-mcp",
241 .dma_mask
= &sa11x0mcp_dma_mask
,
242 .coherent_dma_mask
= 0xffffffff,
244 .num_resources
= ARRAY_SIZE(sa11x0mcp_resources
),
245 .resource
= sa11x0mcp_resources
,
248 void sa11x0_register_mcp(struct mcp_plat_data
*data
)
250 sa11x0_register_device(&sa11x0mcp_device
, data
);
253 static struct resource sa11x0ssp_resources
[] = {
257 .flags
= IORESOURCE_MEM
,
260 .start
= IRQ_Ser4SSP
,
262 .flags
= IORESOURCE_IRQ
,
266 static u64 sa11x0ssp_dma_mask
= 0xffffffffUL
;
268 static struct platform_device sa11x0ssp_device
= {
269 .name
= "sa11x0-ssp",
272 .dma_mask
= &sa11x0ssp_dma_mask
,
273 .coherent_dma_mask
= 0xffffffff,
275 .num_resources
= ARRAY_SIZE(sa11x0ssp_resources
),
276 .resource
= sa11x0ssp_resources
,
279 static struct resource sa11x0fb_resources
[] = {
283 .flags
= IORESOURCE_MEM
,
288 .flags
= IORESOURCE_IRQ
,
292 static struct platform_device sa11x0fb_device
= {
296 .coherent_dma_mask
= 0xffffffff,
298 .num_resources
= ARRAY_SIZE(sa11x0fb_resources
),
299 .resource
= sa11x0fb_resources
,
302 static struct platform_device sa11x0pcmcia_device
= {
303 .name
= "sa11x0-pcmcia",
307 static struct platform_device sa11x0mtd_device
= {
308 .name
= "sa1100-mtd",
312 void sa11x0_register_mtd(struct flash_platform_data
*flash
,
313 struct resource
*res
, int nr
)
315 flash
->name
= "sa1100";
316 sa11x0mtd_device
.resource
= res
;
317 sa11x0mtd_device
.num_resources
= nr
;
318 sa11x0_register_device(&sa11x0mtd_device
, flash
);
321 static struct resource sa11x0ir_resources
[] = {
323 .start
= __PREG(Ser2UTCR0
),
324 .end
= __PREG(Ser2UTCR0
) + 0x24 - 1,
325 .flags
= IORESOURCE_MEM
,
327 .start
= __PREG(Ser2HSCR0
),
328 .end
= __PREG(Ser2HSCR0
) + 0x1c - 1,
329 .flags
= IORESOURCE_MEM
,
331 .start
= __PREG(Ser2HSCR2
),
332 .end
= __PREG(Ser2HSCR2
) + 0x04 - 1,
333 .flags
= IORESOURCE_MEM
,
335 .start
= IRQ_Ser2ICP
,
337 .flags
= IORESOURCE_IRQ
,
341 static struct platform_device sa11x0ir_device
= {
344 .num_resources
= ARRAY_SIZE(sa11x0ir_resources
),
345 .resource
= sa11x0ir_resources
,
348 void sa11x0_register_irda(struct irda_platform_data
*irda
)
350 sa11x0_register_device(&sa11x0ir_device
, irda
);
353 static struct resource sa11x0rtc_resources
[] = {
357 .flags
= IORESOURCE_MEM
,
362 .flags
= IORESOURCE_IRQ
,
365 .start
= IRQ_RTCAlrm
,
367 .flags
= IORESOURCE_IRQ
,
371 static struct platform_device sa11x0rtc_device
= {
372 .name
= "sa1100-rtc",
374 .resource
= sa11x0rtc_resources
,
375 .num_resources
= ARRAY_SIZE(sa11x0rtc_resources
),
378 static struct platform_device
*sa11x0_devices
[] __initdata
= {
383 &sa11x0pcmcia_device
,
388 static int __init
sa1100_init(void)
390 pm_power_off
= sa1100_power_off
;
391 return platform_add_devices(sa11x0_devices
, ARRAY_SIZE(sa11x0_devices
));
394 arch_initcall(sa1100_init
);
396 void (*sa1100fb_backlight_power
)(int on
);
397 void (*sa1100fb_lcd_power
)(int on
);
399 EXPORT_SYMBOL(sa1100fb_backlight_power
);
400 EXPORT_SYMBOL(sa1100fb_lcd_power
);
404 * Common I/O mapping:
406 * Typically, static virtual address mappings are as follow:
408 * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.)
409 * 0xf4000000-0xf4ffffff: SA-1111
410 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area)
411 * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above)
412 * 0xffff0000-0xffff0fff: SA1100 exception vectors
413 * 0xffff2000-0xffff2fff: Minicache copy_user_page area
415 * Below 0xe8000000 is reserved for vm allocation.
417 * The machine specific code must provide the extra mapping beside the
418 * default mapping provided here.
421 static struct map_desc standard_io_desc
[] __initdata
= {
423 .virtual = 0xf8000000,
424 .pfn
= __phys_to_pfn(0x80000000),
425 .length
= 0x00100000,
428 .virtual = 0xfa000000,
429 .pfn
= __phys_to_pfn(0x90000000),
430 .length
= 0x00100000,
433 .virtual = 0xfc000000,
434 .pfn
= __phys_to_pfn(0xa0000000),
435 .length
= 0x00100000,
438 .virtual = 0xfe000000,
439 .pfn
= __phys_to_pfn(0xb0000000),
440 .length
= 0x00200000,
445 void __init
sa1100_map_io(void)
447 iotable_init(standard_io_desc
, ARRAY_SIZE(standard_io_desc
));
451 * Disable the memory bus request/grant signals on the SA1110 to
452 * ensure that we don't receive spurious memory requests. We set
453 * the MBGNT signal false to ensure the SA1111 doesn't own the
456 void __init
sa1110_mb_disable(void)
460 local_irq_save(flags
);
464 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
466 GAFR
&= ~(GPIO_MBGNT
| GPIO_MBREQ
);
468 local_irq_restore(flags
);
472 * If the system is going to use the SA-1111 DMA engines, set up
473 * the memory bus request/grant pins.
475 void __devinit
sa1110_mb_enable(void)
479 local_irq_save(flags
);
483 GPDR
= (GPDR
& ~GPIO_MBREQ
) | GPIO_MBGNT
;
485 GAFR
|= (GPIO_MBGNT
| GPIO_MBREQ
);
488 local_irq_restore(flags
);